78744692456 has 32 divisors (see below), whose sum is σ = 147870001440. Its totient is φ = 39312748608.

The previous prime is 78744692437. The next prime is 78744692527. The reversal of 78744692456 is 65429644787.

It is a happy number.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 20308790 + ... + 20312666.

It is an arithmetic number, because the mean of its divisors is an integer number (4620937545).

Almost surely, 2^78744692456 is an apocalyptic number.

It is an amenable number.

78744692456 is a deficient number, since it is larger than the sum of its proper divisors (69125308984).

78744692456 is a wasteful number, since it uses less digits than its factorization.

78744692456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073 (or 7069 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 62.

The spelling of 78744692456 in words is "seventy-eight billion, seven hundred forty-four million, six hundred ninety-two thousand, four hundred fifty-six".