77929492977 has 12 divisors (see below), whose sum is σ = 128645512320. Its totient is φ = 44531138808.

The previous prime is 77929492969. The next prime is 77929493011.

77929492977 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77929492977 - 2³ = 77929492969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77929492877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618487977 + ... + 618488102.

It is an arithmetic number, because the mean of its divisors is an integer number (10720459360).

Almost surely, 2^77929492977 is an apocalyptic number.

It is an amenable number.

77929492977 is a deficient number, since it is larger than the sum of its proper divisors (50716019343).

77929492977 is a wasteful number, since it uses less digits than its factorization.

77929492977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236976092 (or 1236976089 counting only the distinct ones).

The product of its digits is 252047376, while the sum is 72.

The spelling of 77929492977 in words is "seventy-seven billion, nine hundred twenty-nine million, four hundred ninety-two thousand, nine hundred seventy-seven".