77995859977 has 32 divisors (see below), whose sum is σ = 93391833600. Its totient is φ = 63726179328.

The previous prime is 77995859951. The next prime is 77995860037.

77995859977 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-77995859977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77995859977.

It is not an unprimeable number, because it can be changed into a prime (77995859917) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7040799 + ... + 7051867.

It is an arithmetic number, because the mean of its divisors is an integer number (2918494800).

Almost surely, 2^77995859977 is an apocalyptic number.

It is an amenable number.

77995859977 is a deficient number, since it is larger than the sum of its proper divisors (15395973623).

77995859977 is a wasteful number, since it uses less digits than its factorization.

77995859977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545.

The product of its digits is 3150592200, while the sum is 82.

The spelling of 77995859977 in words is "seventy-seven billion, nine hundred ninety-five million, eight hundred fifty-nine thousand, nine hundred seventy-seven".