78511612900 has 72 divisors (see below), whose sum is σ = 194778186176. Its totient is φ = 26908675200.

The previous prime is 78511612843. The next prime is 78511612919. The reversal of 78511612900 is 921611587.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2107435 + ... + 2144365.

Almost surely, 2^78511612900 is an apocalyptic number.

78511612900 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78511612900 is an abundant number, since it is smaller than the sum of its proper divisors (116266573276).

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

78511612900 is a wasteful number, since it uses less digits than its factorization.

78511612900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39989 (or 39982 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 78511612900 in words is "seventy-eight billion, five hundred eleven million, six hundred twelve thousand, nine hundred".