91769172025 has 24 divisors (see below), whose sum is σ = 117615222144. Its totient is φ = 70987531200.

The previous prime is 91769172007. The next prime is 91769172067. The reversal of 91769172025 is 52027196719.

It is a happy number.

It is not a de Polignac number, because 91769172025 - 2⁵ = 91769171993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91769172025.

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, 372966 + ... + 568015.

It is an arithmetic number, because the mean of its divisors is an integer number (4900634256).

Almost surely, 2^91769172025 is an apocalyptic number.

It is an amenable number.

91769172025 is a deficient number, since it is larger than the sum of its proper divisors (25846050119).

91769172025 is a wasteful number, since it uses less digits than its factorization.

91769172025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941121 (or 941116 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 49.

The spelling of 91769172025 in words is "ninety-one billion, seven hundred sixty-nine million, one hundred seventy-two thousand, twenty-five".