78761857212 has 36 divisors (see below), whose sum is σ = 203328486816. Its totient is φ = 25695357120.

The previous prime is 78761857199. The next prime is 78761857241. The reversal of 78761857212 is 21275816787.

78761857212 is a `hidden beast` number, since 7 + 8 + 7 + 61 + 8 + 572 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23273089 + ... + 23276472.

Almost surely, 2^78761857212 is an apocalyptic number.

It is an amenable number.

78761857212 is an abundant number, since it is smaller than the sum of its proper divisors (124566629604).

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

78761857212 is a wasteful number, since it uses less digits than its factorization.

78761857212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46549618 (or 46549613 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 54.

The spelling of 78761857212 in words is "seventy-eight billion, seven hundred sixty-one million, eight hundred fifty-seven thousand, two hundred twelve".