74431579536 has 160 divisors (see below), whose sum is σ = 236049534720. Its totient is φ = 22335768576.

The previous prime is 74431579529. The next prime is 74431579561. The reversal of 74431579536 is 63597513447.

74431579536 is a `hidden beast` number, since 7 + 4 + 4 + 31 + 5 + 79 + 536 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51415 + ... + 389238.

It is an arithmetic number, because the mean of its divisors is an integer number (1475309592).

Almost surely, 2^74431579536 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 74431579536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118024767360).

74431579536 is an abundant number, since it is smaller than the sum of its proper divisors (161617955184).

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

74431579536 is a wasteful number, since it uses less digits than its factorization.

74431579536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440710 (or 440698 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 54.

The spelling of 74431579536 in words is "seventy-four billion, four hundred thirty-one million, five hundred seventy-nine thousand, five hundred thirty-six".