74431568772 has 432 divisors, whose sum is σ = 231238949760. Its totient is φ = 20072448000.

The previous prime is 74431568759. The next prime is 74431568801. The reversal of 74431568772 is 27786513447.

74431568772 is a `hidden beast` number, since 7 + 4 + 4 + 3 + 1 + 568 + 7 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 116117572 + ... + 116118212.

Almost surely, 2^74431568772 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 74431568772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115619474880).

74431568772 is an abundant number, since it is smaller than the sum of its proper divisors (156807380988).

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

74431568772 is a wasteful number, since it uses less digits than its factorization.

74431568772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 760 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The spelling of 74431568772 in words is "seventy-four billion, four hundred thirty-one million, five hundred sixty-eight thousand, seven hundred seventy-two".