91415711085 has 32 divisors (see below), whose sum is σ = 154607616000. Its totient is φ = 45995697216.

The previous prime is 91415711053. The next prime is 91415711087. The reversal of 91415711085 is 58011751419.

It is not a de Polignac number, because 91415711085 - 2⁵ = 91415711053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91415711087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 602925 + ... + 739154.

It is an arithmetic number, because the mean of its divisors is an integer number (4831488000).

Almost surely, 2^91415711085 is an apocalyptic number.

91415711085 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91415711085 is a deficient number, since it is larger than the sum of its proper divisors (63191904915).

91415711085 is a wasteful number, since it uses less digits than its factorization.

91415711085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342345.

The product of its (nonzero) digits is 50400, while the sum is 42.

The spelling of 91415711085 in words is "ninety-one billion, four hundred fifteen million, seven hundred eleven thousand, eighty-five".