99999999976 has 16 divisors (see below), whose sum is σ = 189159293700. Its totient is φ = 49557521664.

The previous prime is 99999999947. The next prime is 99999999977. The reversal of 99999999976 is 67999999999.

It can be written as a sum of positive squares in 2 ways, for example, as 81333336100 + 18666663876 = 285190^2 + 136626^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99999999977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55308831 + ... + 55310638.

Almost surely, 2^99999999976 is an apocalyptic number.

It is an amenable number.

99999999976 is a deficient number, since it is larger than the sum of its proper divisors (89159293724).

99999999976 is a wasteful number, since it uses less digits than its factorization.

99999999976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110619588 (or 110619584 counting only the distinct ones).

The product of its digits is 16271660538, while the sum is 94.

The spelling of 99999999976 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-six".