91725729908 has 12 divisors (see below), whose sum is σ = 162454004160. Its totient is φ = 45310300152.

The previous prime is 91725729883. The next prime is 91725729911. The reversal of 91725729908 is 80992752719.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138140828 + ... + 138141491.

It is an arithmetic number, because the mean of its divisors is an integer number (13537833680).

Almost surely, 2^91725729908 is an apocalyptic number.

It is an amenable number.

91725729908 is a deficient number, since it is larger than the sum of its proper divisors (70728274252).

91725729908 is a wasteful number, since it uses less digits than its factorization.

91725729908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276282406 (or 276282404 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 59.

The spelling of 91725729908 in words is "ninety-one billion, seven hundred twenty-five million, seven hundred twenty-nine thousand, nine hundred eight".