77685152 has 24 divisors (see below), whose sum is σ = 153151236. Its totient is φ = 38789632.

The previous prime is 77685151. The next prime is 77685169. The reversal of 77685152 is 25158677.

It can be written as a sum of positive squares in 2 ways, for example, as 73342096 + 4343056 = 8564^2 + 2084^2 .

It is not an unprimeable number, because it can be changed into a prime (77685151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33998 + ... + 36210.

Almost surely, 2^77685152 is an apocalyptic number.

It is an amenable number.

77685152 is a deficient number, since it is larger than the sum of its proper divisors (75466084).

77685152 is a wasteful number, since it uses less digits than its factorization.

77685152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320 (or 3312 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 77685152 is about 8813.9180844843. The cubic root of 77685152 is about 426.6902048646.

The spelling of 77685152 in words is "seventy-seven million, six hundred eighty-five thousand, one hundred fifty-two".