91253107972 has 12 divisors (see below), whose sum is σ = 171977011276. Its totient is φ = 42116819040.

The previous prime is 91253107903. The next prime is 91253107997. The reversal of 91253107972 is 27970135219.

It can be written as a sum of positive squares in 2 ways, for example, as 31196743876 + 60056364096 = 176626^2 + 245064^2 .

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, 877433679 + ... + 877433782.

Almost surely, 2^91253107972 is an apocalyptic number.

It is an amenable number.

91253107972 is a deficient number, since it is larger than the sum of its proper divisors (80723903304).

91253107972 is a wasteful number, since it uses less digits than its factorization.

91253107972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754867478 (or 1754867476 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 91253107972 in words is "ninety-one billion, two hundred fifty-three million, one hundred seven thousand, nine hundred seventy-two".