78267297912 has 32 divisors (see below), whose sum is σ = 200956578000. Its totient is φ = 25383988224.

The previous prime is 78267297907. The next prime is 78267297929. The reversal of 78267297912 is 21979276287.

It is a super-2 number, since 2×78267297912² (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 7 ways as a sum of consecutive naturals, for example, 44068537 + ... + 44070312.

Almost surely, 2^78267297912 is an apocalyptic number.

It is an amenable number.

78267297912 is an abundant number, since it is smaller than the sum of its proper divisors (122689280088).

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

78267297912 is a wasteful number, since it uses less digits than its factorization.

78267297912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88138895 (or 88138891 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 60.

The spelling of 78267297912 in words is "seventy-eight billion, two hundred sixty-seven million, two hundred ninety-seven thousand, nine hundred twelve".