91659015908279 has 4 divisors (see below), whose sum is σ = 91659143047200. Its totient is φ = 91658888769360.

The previous prime is 91659015908233. The next prime is 91659015908281. The reversal of 91659015908279 is 97280951095619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91659015908279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91659015901279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62481854 + ... + 63931995.

It is an arithmetic number, because the mean of its divisors is an integer number (22914785761800).

Almost surely, 2^{91659015908279} is an apocalyptic number.

91659015908279 is a deficient number, since it is larger than the sum of its proper divisors (127138921).

91659015908279 is a wasteful number, since it uses less digits than its factorization.

91659015908279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127138920.

The product of its (nonzero) digits is 110224800, while the sum is 71.

The spelling of 91659015908279 in words is "ninety-one trillion, six hundred fifty-nine billion, fifteen million, nine hundred eight thousand, two hundred seventy-nine".