77580812 has 12 divisors (see below), whose sum is σ = 136552416. Its totient is φ = 38565840.

The previous prime is 77580803. The next prime is 77580851. The reversal of 77580812 is 21808577.

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 3 ways as a sum of consecutive naturals, for example, 55364 + ... + 56747.

It is an arithmetic number, because the mean of its divisors is an integer number (11379368).

Almost surely, 2^77580812 is an apocalyptic number.

It is an amenable number.

77580812 is a deficient number, since it is larger than the sum of its proper divisors (58971604).

77580812 is a wasteful number, since it uses less digits than its factorization.

77580812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112288 (or 112286 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 77580812 is about 8807.9970481376. The cubic root of 77580812 is about 426.4990881072.

The spelling of 77580812 in words is "seventy-seven million, five hundred eighty thousand, eight hundred twelve".