78125816 has 16 divisors (see below), whose sum is σ = 149250600. Its totient is φ = 38325664.

The previous prime is 78125807. The next prime is 78125843. The reversal of 78125816 is 61852187.

It is a super-2 number, since 2×78125816² = 12207286251331712, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 78125816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91706 + ... + 92553.

Almost surely, 2^78125816 is an apocalyptic number.

It is an amenable number.

78125816 is a deficient number, since it is larger than the sum of its proper divisors (71124784).

78125816 is a wasteful number, since it uses less digits than its factorization.

78125816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184318 (or 184314 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 78125816 is about 8838.8809246420. The cubic root of 78125816 is about 427.4954750271.

The spelling of 78125816 in words is "seventy-eight million, one hundred twenty-five thousand, eight hundred sixteen".