74925359640 has 320 divisors, whose sum is σ = 260974755360. Its totient is φ = 19264573440.

The previous prime is 74925359623. The next prime is 74925359653. The reversal of 74925359640 is 4695352947.

74925359640 is a `hidden beast` number, since 7 + 4 + 9 + 2 + 5 + 3 + 596 + 40 = 666.

It is a super-2 number, since 2×74925359640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13543675 + ... + 13549205.

Almost surely, 2^74925359640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74925359640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130487377680).

74925359640 is an abundant number, since it is smaller than the sum of its proper divisors (186049395720).

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

74925359640 is a wasteful number, since it uses less digits than its factorization.

74925359640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704 (or 5691 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 74925359640 in words is "seventy-four billion, nine hundred twenty-five million, three hundred fifty-nine thousand, six hundred forty".