78837855012 has 60 divisors (see below), whose sum is σ = 235540264960. Its totient is φ = 22525100784.

The previous prime is 78837854993. The next prime is 78837855017. The reversal of 78837855012 is 21055873887.

78837855012 is a `hidden beast` number, since 7 + 8 + 8 + 3 + 78 + 550 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 78837855012.

It is not an unprimeable number, because it can be changed into a prime (78837855017) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17378212 + ... + 17382747.

Almost surely, 2^78837855012 is an apocalyptic number.

It is an amenable number.

78837855012 is an abundant number, since it is smaller than the sum of its proper divisors (156702409948).

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

78837855012 is a wasteful number, since it uses less digits than its factorization.

78837855012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34760982 (or 34760971 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The spelling of 78837855012 in words is "seventy-eight billion, eight hundred thirty-seven million, eight hundred fifty-five thousand, twelve".