99774923136 has 128 divisors (see below), whose sum is σ = 318829804800. Its totient is φ = 27006732288.

The previous prime is 99774923093. The next prime is 99774923141. The reversal of 99774923136 is 63132947799.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 99774923136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925735 + ... + 1027878.

It is an arithmetic number, because the mean of its divisors is an integer number (2490857850).

Almost surely, 2^99774923136 is an apocalyptic number.

99774923136 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

99774923136 is an abundant number, since it is smaller than the sum of its proper divisors (219054881664).

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

99774923136 is a wasteful number, since it uses less digits than its factorization.

99774923136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953656 (or 1953644 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 60.

The spelling of 99774923136 in words is "ninety-nine billion, seven hundred seventy-four million, nine hundred twenty-three thousand, one hundred thirty-six".