91204249475 has 24 divisors (see below), whose sum is σ = 113529177120. Its totient is φ = 72682686720.

The previous prime is 91204249469. The next prime is 91204249511. The reversal of 91204249475 is 57494240219.

It is a happy number.

It is not a de Polignac number, because 91204249475 - 2⁴ = 91204249459 is a prime.

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, 7734434 + ... + 7746216.

It is an arithmetic number, because the mean of its divisors is an integer number (4730382380).

Almost surely, 2^91204249475 is an apocalyptic number.

91204249475 is a deficient number, since it is larger than the sum of its proper divisors (22324927645).

91204249475 is a wasteful number, since it uses less digits than its factorization.

91204249475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12959 (or 12954 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 91204249475 in words is "ninety-one billion, two hundred four million, two hundred forty-nine thousand, four hundred seventy-five".