91724472425 has 12 divisors (see below), whose sum is σ = 115666116240. Its totient is φ = 72135855120.

The previous prime is 91724472407. The next prime is 91724472431. The reversal of 91724472425 is 52427442719.

It is not a de Polignac number, because 91724472425 - 2²⁰ = 91723423849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91724472425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31091567 + ... + 31094516.

It is an arithmetic number, because the mean of its divisors is an integer number (9638843020).

Almost surely, 2^91724472425 is an apocalyptic number.

It is an amenable number.

91724472425 is a deficient number, since it is larger than the sum of its proper divisors (23941643815).

91724472425 is a wasteful number, since it uses less digits than its factorization.

91724472425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62186152 (or 62186147 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The spelling of 91724472425 in words is "ninety-one billion, seven hundred twenty-four million, four hundred seventy-two thousand, four hundred twenty-five".