78581164 has 6 divisors (see below), whose sum is σ = 137517044. Its totient is φ = 39290580.

The previous prime is 78581161. The next prime is 78581171. The reversal of 78581164 is 46118587.

It is not an unprimeable number, because it can be changed into a prime (78581161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9822642 + ... + 9822649.

Almost surely, 2^78581164 is an apocalyptic number.

It is an amenable number.

78581164 is a deficient number, since it is larger than the sum of its proper divisors (58935880).

78581164 is a wasteful number, since it uses less digits than its factorization.

78581164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19645295 (or 19645293 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 78581164 is about 8864.6017395030. The cubic root of 78581164 is about 428.3244039515.

The spelling of 78581164 in words is "seventy-eight million, five hundred eighty-one thousand, one hundred sixty-four".