78865197250 has 64 divisors (see below), whose sum is σ = 178651609344. Its totient is φ = 25448928000.

The previous prime is 78865197247. The next prime is 78865197263. The reversal of 78865197250 is 5279156887.

It is a Smith number, since the sum of its digits (58) 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 31 ways as a sum of consecutive naturals, for example, 1295716 + ... + 1355215.

It is an arithmetic number, because the mean of its divisors is an integer number (2791431396).

Almost surely, 2^78865197250 is an apocalyptic number.

78865197250 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78865197250 is an abundant number, since it is smaller than the sum of its proper divisors (99786412094).

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

78865197250 is a wasteful number, since it uses less digits than its factorization.

78865197250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650972 (or 2650962 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 78865197250 in words is "seventy-eight billion, eight hundred sixty-five million, one hundred ninety-seven thousand, two hundred fifty".