99999999768 has 64 divisors (see below), whose sum is σ = 251267132160. Its totient is φ = 33164706176.

The previous prime is 99999999763. The next prime is 99999999769. The reversal of 99999999768 is 86799999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999999761) 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 15 ways as a sum of consecutive naturals, for example, 5210446 + ... + 5229602.

It is an arithmetic number, because the mean of its divisors is an integer number (3926048940).

Almost surely, 2^99999999768 is an apocalyptic number.

It is an amenable number.

99999999768 is an abundant number, since it is smaller than the sum of its proper divisors (151267132392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999999768 is a wasteful number, since it uses less digits than its factorization.

99999999768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20256 (or 20252 counting only the distinct ones).

The product of its digits is 14463698256, while the sum is 93.

The spelling of 99999999768 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred sixty-eight".