78678964325 has 12 divisors (see below), whose sum is σ = 105066678948. Its totient is φ = 58101388800.

The previous prime is 78678964319. The next prime is 78678964327. The reversal of 78678964325 is 52346987687.

It can be written as a sum of positive squares in 6 ways, for example, as 17143712356 + 61535251969 = 130934^2 + 248063^2 .

It is not a de Polignac number, because 78678964325 - 2²⁰ = 78677915749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78678964327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121044236 + ... + 121044885.

It is an arithmetic number, because the mean of its divisors is an integer number (8755556579).

Almost surely, 2^78678964325 is an apocalyptic number.

It is an amenable number.

78678964325 is a deficient number, since it is larger than the sum of its proper divisors (26387714623).

78678964325 is a wasteful number, since it uses less digits than its factorization.

78678964325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242089144 (or 242089139 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 65.

The spelling of 78678964325 in words is "seventy-eight billion, six hundred seventy-eight million, nine hundred sixty-four thousand, three hundred twenty-five".