91725729900 has 72 divisors (see below), whose sum is σ = 303306420480. Its totient is φ = 20965880640.

The previous prime is 91725729883. The next prime is 91725729911. The reversal of 91725729900 is 992752719.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21837360 + ... + 21841559.

Almost surely, 2^91725729900 is an apocalyptic number.

It is an amenable number.

91725729900 is an abundant number, since it is smaller than the sum of its proper divisors (211580690580).

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

91725729900 is a wasteful number, since it uses less digits than its factorization.

91725729900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43678943 (or 43678936 counting only the distinct ones).

The product of its (nonzero) digits is 714420, while the sum is 51.

The spelling of 91725729900 in words is "ninety-one billion, seven hundred twenty-five million, seven hundred twenty-nine thousand, nine hundred".