91710434525 has 18 divisors (see below), whose sum is σ = 120021279642. Its totient is φ = 69506848800.

The previous prime is 91710434507. The next prime is 91710434551. The reversal of 91710434525 is 52543401719.

It can be written as a sum of positive squares in 3 ways, for example, as 11414144569 + 80296289956 = 106837^2 + 283366^2 .

It is not a de Polignac number, because 91710434525 - 2⁸ = 91710434269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5071886 + ... + 5089935.

It is an arithmetic number, because the mean of its divisors is an integer number (6667848869).

Almost surely, 2^91710434525 is an apocalyptic number.

91710434525 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91710434525 is a deficient number, since it is larger than the sum of its proper divisors (28310845117).

91710434525 is a wasteful number, since it uses less digits than its factorization.

91710434525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161869 (or 10161845 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 91710434525 in words is "ninety-one billion, seven hundred ten million, four hundred thirty-four thousand, five hundred twenty-five".