99774636672 has 64 divisors (see below), whose sum is σ = 265790498400. Its totient is φ = 33162322944.

The previous prime is 99774636671. The next prime is 99774636701. The reversal of 99774636672 is 27663647799.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (99774636671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241147 + ... + 507642.

Almost surely, 2^99774636672 is an apocalyptic number.

It is an amenable number.

99774636672 is an abundant number, since it is smaller than the sum of its proper divisors (166015861728).

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

99774636672 is a wasteful number, since it uses less digits than its factorization.

99774636672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749153 (or 749141 counting only the distinct ones).

The product of its digits is 144027072, while the sum is 66.

The spelling of 99774636672 in words is "ninety-nine billion, seven hundred seventy-four million, six hundred thirty-six thousand, six hundred seventy-two".