8778792959991 has 12 divisors (see below), whose sum is σ = 12680567612232. Its totient is φ = 5852487612816.

The previous prime is 8778792959947. The next prime is 8778792960019. The reversal of 8778792959991 is 1999592978778.

8778792959991 is a `hidden beast` number, since 8 + 7 + 7 + 8 + 7 + 9 + 2 + 9 + 599 + 9 + 1 = 666.

It is not a de Polignac number, because 8778792959991 - 2¹⁰ = 8778792958967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8778792959191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2034241 + ... + 4657866.

It is an arithmetic number, because the mean of its divisors is an integer number (1056713967686).

Almost surely, 2^{8778792959991} is an apocalyptic number.

8778792959991 is a deficient number, since it is larger than the sum of its proper divisors (3901774652241).

8778792959991 is a wasteful number, since it uses less digits than its factorization.

8778792959991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6837870 (or 6837867 counting only the distinct ones).

The product of its digits is 12962436480, while the sum is 90.

The spelling of 8778792959991 in words is "eight trillion, seven hundred seventy-eight billion, seven hundred ninety-two million, nine hundred fifty-nine thousand, nine hundred ninety-one".