99776888867799 has 64 divisors (see below), whose sum is σ = 173719203194880. Its totient is φ = 55800161746560.

The previous prime is 99776888867767. The next prime is 99776888867819.

99776888867799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99776888867799 - 2⁵ = 99776888867767 is a prime.

It is a super-2 number, since 2×99776888867799² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99776888867799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99776888867729) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6886689 + ... + 15715605.

It is an arithmetic number, because the mean of its divisors is an integer number (2714362549920).

Almost surely, 2^{99776888867799} is an apocalyptic number.

99776888867799 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99776888867799 is a deficient number, since it is larger than the sum of its proper divisors (73942314327081).

99776888867799 is a wasteful number, since it uses less digits than its factorization.

99776888867799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8831877 (or 8831871 counting only the distinct ones).

The product of its digits is 2322868617216, while the sum is 108.

The spelling of 99776888867799 in words is "ninety-nine trillion, seven hundred seventy-six billion, eight hundred eighty-eight million, eight hundred sixty-seven thousand, seven hundred ninety-nine".