91585617445 has 32 divisors (see below), whose sum is σ = 132307718400. Its totient is φ = 59453968896.

The previous prime is 91585617439. The next prime is 91585617479. The reversal of 91585617445 is 54471658519.

It is not a de Polignac number, because 91585617445 - 2²⁵ = 91552063013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902097 + ... + 998473.

It is an arithmetic number, because the mean of its divisors is an integer number (4134616200).

Almost surely, 2^91585617445 is an apocalyptic number.

91585617445 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91585617445 is a deficient number, since it is larger than the sum of its proper divisors (40722100955).

91585617445 is a wasteful number, since it uses less digits than its factorization.

91585617445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97837.

The product of its digits is 6048000, while the sum is 55.

The spelling of 91585617445 in words is "ninety-one billion, five hundred eighty-five million, six hundred seventeen thousand, four hundred forty-five".