77530864 has 40 divisors (see below), whose sum is σ = 153740160. Its totient is φ = 37867200.

The previous prime is 77530853. The next prime is 77530879. The reversal of 77530864 is 46803577.

It is a super-2 number, since 2×77530864² = 12022069745172992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157659 + ... + 158149.

It is an arithmetic number, because the mean of its divisors is an integer number (3843504).

Almost surely, 2^77530864 is an apocalyptic number.

It is an amenable number.

77530864 is a deficient number, since it is larger than the sum of its proper divisors (76209296).

77530864 is a wasteful number, since it uses less digits than its factorization.

77530864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 77530864 is about 8805.1612137428. The cubic root of 77530864 is about 426.4075390534.

The spelling of 77530864 in words is "seventy-seven million, five hundred thirty thousand, eight hundred sixty-four".