977578875779 has 4 divisors (see below), whose sum is σ = 1066449682680. Its totient is φ = 888708068880.

The previous prime is 977578875731. The next prime is 977578875787.

977578875779 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 977578875779 - 2⁸ = 977578875523 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 977578875779.

It is not an unprimeable number, because it can be changed into a prime (977578875799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44435403434 + ... + 44435403455.

It is an arithmetic number, because the mean of its divisors is an integer number (266612420670).

Almost surely, 2^977578875779 is an apocalyptic number.

977578875779 is a deficient number, since it is larger than the sum of its proper divisors (88870806901).

977578875779 is a wasteful number, since it uses less digits than its factorization.

977578875779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88870806900.

The product of its digits is 15247310400, while the sum is 86.

The spelling of 977578875779 in words is "nine hundred seventy-seven billion, five hundred seventy-eight million, eight hundred seventy-five thousand, seven hundred seventy-nine".