91930475025 has 72 divisors (see below), whose sum is σ = 172230851520. Its totient is φ = 46784833920.

The previous prime is 91930475011. The next prime is 91930475029. The reversal of 91930475025 is 52057403919.

It is a happy number.

91930475025 is a `hidden beast` number, since 91 + 93 + 0 + 475 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 91930475025 - 2¹⁶ = 91930409489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (91930475029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2147127 + ... + 2189523.

It is an arithmetic number, because the mean of its divisors is an integer number (2392095160).

Almost surely, 2^91930475025 is an apocalyptic number.

It is an amenable number.

91930475025 is a deficient number, since it is larger than the sum of its proper divisors (80300376495).

91930475025 is a wasteful number, since it uses less digits than its factorization.

91930475025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42855 (or 42847 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 91930475025 in words is "ninety-one billion, nine hundred thirty million, four hundred seventy-five thousand, twenty-five".