99909688272 has 40 divisors (see below), whose sum is σ = 261209677344. Its totient is φ = 32901984384.

The previous prime is 99909688271. The next prime is 99909688297. The reversal of 99909688272 is 27288690999.

It is a junction number, because it is equal to n+sod(n) for n = 99909688197 and 99909688206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99909688271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12534883 + ... + 12542850.

Almost surely, 2^99909688272 is an apocalyptic number.

It is an amenable number.

99909688272 is an abundant number, since it is smaller than the sum of its proper divisors (161299989072).

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

99909688272 is a wasteful number, since it uses less digits than its factorization.

99909688272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25077827 (or 25077821 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 69.

The spelling of 99909688272 in words is "ninety-nine billion, nine hundred nine million, six hundred eighty-eight thousand, two hundred seventy-two".