78513434992 has 10 divisors (see below), whose sum is σ = 152119780328. Its totient is φ = 39256717488.

The previous prime is 78513434891. The next prime is 78513435017. The reversal of 78513434992 is 29943431587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2453544828 + ... + 2453544859.

Almost surely, 2^78513434992 is an apocalyptic number.

It is an amenable number.

78513434992 is a deficient number, since it is larger than the sum of its proper divisors (73606345336).

78513434992 is a wasteful number, since it uses less digits than its factorization.

78513434992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907089695 (or 4907089689 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 78513434992 in words is "seventy-eight billion, five hundred thirteen million, four hundred thirty-four thousand, nine hundred ninety-two".