78113637812 has 48 divisors (see below), whose sum is σ = 156930939648. Its totient is φ = 33326653440.

The previous prime is 78113637781. The next prime is 78113637857. The reversal of 78113637812 is 21873631187.

It is a super-2 number, since 2×78113637812² (a number of 23 digits) contains 22 as substring.

It is a congruent 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, 21276737 + ... + 21280407.

It is an arithmetic number, because the mean of its divisors is an integer number (3269394576).

Almost surely, 2^78113637812 is an apocalyptic number.

It is an amenable number.

78113637812 is an abundant number, since it is smaller than the sum of its proper divisors (78817301836).

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

78113637812 is a wasteful number, since it uses less digits than its factorization.

78113637812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896 (or 6894 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The spelling of 78113637812 in words is "seventy-eight billion, one hundred thirteen million, six hundred thirty-seven thousand, eight hundred twelve".