91560532665 has 64 divisors (see below), whose sum is σ = 171147110400. Its totient is φ = 40933085184.

The previous prime is 91560532597. The next prime is 91560532699. The reversal of 91560532665 is 56623506519.

It is not a de Polignac number, because 91560532665 - 2⁸ = 91560532409 is a prime.

It is a super-2 number, since 2×91560532665² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1157346 + ... + 1233924.

It is an arithmetic number, because the mean of its divisors is an integer number (2674173600).

Almost surely, 2^91560532665 is an apocalyptic number.

It is an amenable number.

91560532665 is a deficient number, since it is larger than the sum of its proper divisors (79586577735).

91560532665 is a wasteful number, since it uses less digits than its factorization.

91560532665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76846.

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 91560532665 in words is "ninety-one billion, five hundred sixty million, five hundred thirty-two thousand, six hundred sixty-five".