74715697920 has 144 divisors (see below), whose sum is σ = 239554919520. Its totient is φ = 19846397952.

The previous prime is 74715697879. The next prime is 74715697939. The reversal of 74715697920 is 2979651747.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 949026 + ... + 1024734.

It is an arithmetic number, because the mean of its divisors is an integer number (1663575830).

Almost surely, 2^74715697920 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 74715697920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119777459760).

74715697920 is an abundant number, since it is smaller than the sum of its proper divisors (164839221600).

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

74715697920 is a wasteful number, since it uses less digits than its factorization.

74715697920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75990 (or 75976 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 57.

The spelling of 74715697920 in words is "seventy-four billion, seven hundred fifteen million, six hundred ninety-seven thousand, nine hundred twenty".