78858561692 has 18 divisors (see below), whose sum is σ = 142925288688. Its totient is φ = 38069648848.

The previous prime is 78858561679. The next prime is 78858561751. The reversal of 78858561692 is 29616585887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11717588 + ... + 11724315.

It is an arithmetic number, because the mean of its divisors is an integer number (7940293816).

Almost surely, 2^78858561692 is an apocalyptic number.

It is an amenable number.

78858561692 is a deficient number, since it is larger than the sum of its proper divisors (64066726996).

78858561692 is a wasteful number, since it uses less digits than its factorization.

78858561692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23441965 (or 23441934 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 65.

The spelling of 78858561692 in words is "seventy-eight billion, eight hundred fifty-eight million, five hundred sixty-one thousand, six hundred ninety-two".