74969943552 has 640 divisors, whose sum is σ = 263066496000. Its totient is φ = 21069103104.

The previous prime is 74969943497. The next prime is 74969943583. The reversal of 74969943552 is 25534996947.

74969943552 is a `hidden beast` number, since 7 + 496 + 9 + 94 + 3 + 5 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 74969943552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 459938223 + ... + 459938385.

It is an arithmetic number, because the mean of its divisors is an integer number (411041400).

Almost surely, 2^74969943552 is an apocalyptic number.

74969943552 is a gapful number since it is divisible by the number (72) 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 74969943552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131533248000).

74969943552 is an abundant number, since it is smaller than the sum of its proper divisors (188096552448).

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

74969943552 is an equidigital number, since it uses as much as digits as its factorization.

74969943552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 272 counting only the distinct ones).

The product of its digits is 73483200, while the sum is 63.

The spelling of 74969943552 in words is "seventy-four billion, nine hundred sixty-nine million, nine hundred forty-three thousand, five hundred fifty-two".