74799544659840 has 1920 divisors, whose sum is σ = 361374062132160. Its totient is φ = 14347055923200.

The previous prime is 74799544659799. The next prime is 74799544659841. The reversal of 74799544659840 is 4895644599747.

74799544659840 is a `hidden beast` number, since 7 + 4 + 7 + 9 + 9 + 544 + 65 + 9 + 8 + 4 + 0 = 666.

74799544659840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a super-2 number, since 2×74799544659840² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 74799544659840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74799544659841) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 570744720 + ... + 570875760.

Almost surely, 2^{74799544659840} is an apocalyptic number.

74799544659840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74799544659840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180687031066080).

74799544659840 is an abundant number, since it is smaller than the sum of its proper divisors (286574517472320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74799544659840 is a wasteful number, since it uses less digits than its factorization.

74799544659840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131114 (or 131082 counting only the distinct ones).

The product of its (nonzero) digits is 10973491200, while the sum is 81.

The spelling of 74799544659840 in words is "seventy-four trillion, seven hundred ninety-nine billion, five hundred forty-four million, six hundred fifty-nine thousand, eight hundred forty".