78518647020 has 96 divisors (see below), whose sum is σ = 239899080960. Its totient is φ = 19030037760.

The previous prime is 78518647019. The next prime is 78518647043. The reversal of 78518647020 is 2074681587.

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, 3104586 + ... + 3129774.

It is an arithmetic number, because the mean of its divisors is an integer number (2498948760).

Almost surely, 2^78518647020 is an apocalyptic number.

It is an amenable number.

78518647020 is an abundant number, since it is smaller than the sum of its proper divisors (161380433940).

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

78518647020 is a wasteful number, since it uses less digits than its factorization.

78518647020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29935 (or 29933 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 78518647020 in words is "seventy-eight billion, five hundred eighteen million, six hundred forty-seven thousand, twenty".