78857757210 has 16 divisors (see below), whose sum is σ = 189258617376. Its totient is φ = 21028735248.

The previous prime is 78857757113. The next prime is 78857757211. The reversal of 78857757210 is 1275775887.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78857757211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1314295924 + ... + 1314295983.

It is an arithmetic number, because the mean of its divisors is an integer number (11828663586).

Almost surely, 2^78857757210 is an apocalyptic number.

78857757210 is an abundant number, since it is smaller than the sum of its proper divisors (110400860166).

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

78857757210 is a wasteful number, since it uses less digits than its factorization.

78857757210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628591917.

The product of its (nonzero) digits is 7683200, while the sum is 57.

The spelling of 78857757210 in words is "seventy-eight billion, eight hundred fifty-seven million, seven hundred fifty-seven thousand, two hundred ten".