91606497505 has 16 divisors (see below), whose sum is σ = 112301950464. Its totient is φ = 71703408960.

The previous prime is 91606497487. The next prime is 91606497511. The reversal of 91606497505 is 50579460619.

It is not a de Polignac number, because 91606497505 - 2¹¹ = 91606495457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709099 + ... + 828271.

It is an arithmetic number, because the mean of its divisors is an integer number (7018871904).

Almost surely, 2^91606497505 is an apocalyptic number.

It is an amenable number.

91606497505 is a deficient number, since it is larger than the sum of its proper divisors (20695452959).

91606497505 is a wasteful number, since it uses less digits than its factorization.

91606497505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122496.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 91606497505 in words is "ninety-one billion, six hundred six million, four hundred ninety-seven thousand, five hundred five".