77144968 has 16 divisors (see below), whose sum is σ = 145975500. Its totient is φ = 38218176.

The previous prime is 77144941. The next prime is 77144971. The reversal of 77144968 is 86944177.

It can be written as a sum of positive squares in 2 ways, for example, as 67272804 + 9872164 = 8202^2 + 3142^2 .

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, 43363 + ... + 45106.

Almost surely, 2^77144968 is an apocalyptic number.

It is an amenable number.

77144968 is a deficient number, since it is larger than the sum of its proper divisors (68830532).

77144968 is a wasteful number, since it uses less digits than its factorization.

77144968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88584 (or 88580 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 77144968 is about 8783.2208215438. The cubic root of 77144968 is about 425.6989063148.

The spelling of 77144968 in words is "seventy-seven million, one hundred forty-four thousand, nine hundred sixty-eight".