78839966252 has 24 divisors (see below), whose sum is σ = 145566985200. Its totient is φ = 37258983936.

The previous prime is 78839966221. The next prime is 78839966267. The reversal of 78839966252 is 25266993887.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

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, 1164977 + ... + 1230792.

It is an arithmetic number, because the mean of its divisors is an integer number (6065291050).

Almost surely, 2^78839966252 is an apocalyptic number.

It is an amenable number.

78839966252 is a deficient number, since it is larger than the sum of its proper divisors (66727018948).

78839966252 is a wasteful number, since it uses less digits than its factorization.

78839966252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396225 (or 2396223 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 65.

The spelling of 78839966252 in words is "seventy-eight billion, eight hundred thirty-nine million, nine hundred sixty-six thousand, two hundred fifty-two".