78919064625 has 32 divisors (see below), whose sum is σ = 131697820800. Its totient is φ = 41969496000.

The previous prime is 78919064603. The next prime is 78919064647. The reversal of 78919064625 is 52646091987.

It is an interprime number because it is at equal distance from previous prime (78919064603) and next prime (78919064647).

It is not a de Polignac number, because 78919064625 - 2²³ = 78910676017 is a prime.

It is a super-2 number, since 2×78919064625² (a number of 23 digits) contains 22 as substring.

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, 170631 + ... + 432380.

It is an arithmetic number, because the mean of its divisors is an integer number (4115556900).

Almost surely, 2^78919064625 is an apocalyptic number.

78919064625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78919064625 is a deficient number, since it is larger than the sum of its proper divisors (52778756175).

78919064625 is a wasteful number, since it uses less digits than its factorization.

78919064625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603378 (or 603368 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 78919064625 in words is "seventy-eight billion, nine hundred nineteen million, sixty-four thousand, six hundred twenty-five".