91858866601 has 16 divisors (see below), whose sum is σ = 94464090000. Its totient is φ = 89271705600.

The previous prime is 91858866569. The next prime is 91858866607. The reversal of 91858866601 is 10666885819.

It can be written as a sum of positive squares in 8 ways, for example, as 1212710976 + 90646155625 = 34824^2 + 301075^2 .

It is a cyclic number.

It is not a de Polignac number, because 91858866601 - 2⁵ = 91858866569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91858866607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12164575 + ... + 12172123.

It is an arithmetic number, because the mean of its divisors is an integer number (5904005625).

Almost surely, 2^91858866601 is an apocalyptic number.

It is an amenable number.

91858866601 is a deficient number, since it is larger than the sum of its proper divisors (2605223399).

91858866601 is a wasteful number, since it uses less digits than its factorization.

91858866601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8700.

The product of its (nonzero) digits is 4976640, while the sum is 58.

The spelling of 91858866601 in words is "ninety-one billion, eight hundred fifty-eight million, eight hundred sixty-six thousand, six hundred one".