77955816 has 16 divisors (see below), whose sum is σ = 194889600. Its totient is φ = 25985264.

The previous prime is 77955811. The next prime is 77955817. The reversal of 77955816 is 61855977.

It is not an unprimeable number, because it can be changed into a prime (77955811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624056 + ... + 1624103.

It is an arithmetic number, because the mean of its divisors is an integer number (12180600).

Almost surely, 2^77955816 is an apocalyptic number.

It is an amenable number.

77955816 is an abundant number, since it is smaller than the sum of its proper divisors (116933784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77955816 is a wasteful number, since it uses less digits than its factorization.

77955816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248168 (or 3248164 counting only the distinct ones).

The product of its digits is 529200, while the sum is 48.

The square root of 77955816 is about 8829.2590855632. The cubic root of 77955816 is about 427.1851763713.

The spelling of 77955816 in words is "seventy-seven million, nine hundred fifty-five thousand, eight hundred sixteen".