91086586513 has 16 divisors (see below), whose sum is σ = 101099496960. Its totient is φ = 81535968576.

The previous prime is 91086586489. The next prime is 91086586529. The reversal of 91086586513 is 31568568019.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91086586513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91086586543) 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, 617245 + ... + 750442.

It is an arithmetic number, because the mean of its divisors is an integer number (6318718560).

Almost surely, 2^91086586513 is an apocalyptic number.

It is an amenable number.

91086586513 is a deficient number, since it is larger than the sum of its proper divisors (10012910447).

91086586513 is a wasteful number, since it uses less digits than its factorization.

91086586513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367856.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 91086586513 in words is "ninety-one billion, eighty-six million, five hundred eighty-six thousand, five hundred thirteen".