78513465275 has 24 divisors (see below), whose sum is σ = 116102402304. Its totient is φ = 51497028000.

The previous prime is 78513465271. The next prime is 78513465287. The reversal of 78513465275 is 57256431587.

It is not a de Polignac number, because 78513465275 - 2² = 78513465271 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78513465271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9749201 + ... + 9757250.

It is an arithmetic number, because the mean of its divisors is an integer number (4837600096).

Almost surely, 2^78513465275 is an apocalyptic number.

78513465275 is a deficient number, since it is larger than the sum of its proper divisors (37588937029).

78513465275 is a wasteful number, since it uses less digits than its factorization.

78513465275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19506491 (or 19506486 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 53.

The spelling of 78513465275 in words is "seventy-eight billion, five hundred thirteen million, four hundred sixty-five thousand, two hundred seventy-five".