91113858645 has 32 divisors (see below), whose sum is σ = 152450774784. Its totient is φ = 46380364800.

The previous prime is 91113858637. The next prime is 91113858653. The reversal of 91113858645 is 54685831119.

It is an interprime number because it is at equal distance from previous prime (91113858637) and next prime (91113858653).

It is not a de Polignac number, because 91113858645 - 2³ = 91113858637 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, 127396 + ... + 445485.

It is an arithmetic number, because the mean of its divisors is an integer number (4764086712).

Almost surely, 2^91113858645 is an apocalyptic number.

It is an amenable number.

91113858645 is a deficient number, since it is larger than the sum of its proper divisors (61336916139).

91113858645 is a wasteful number, since it uses less digits than its factorization.

91113858645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573373.

The product of its digits is 1036800, while the sum is 51.

The spelling of 91113858645 in words is "ninety-one billion, one hundred thirteen million, eight hundred fifty-eight thousand, six hundred forty-five".