91259317061 has 16 divisors (see below), whose sum is σ = 100574023680. Its totient is φ = 82115177520.

The previous prime is 91259317043. The next prime is 91259317081. The reversal of 91259317061 is 16071395219.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91259317061 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 (91259317081) 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, 2290436 + ... + 2329938.

It is an arithmetic number, because the mean of its divisors is an integer number (6285876480).

Almost surely, 2^91259317061 is an apocalyptic number.

It is an amenable number.

91259317061 is a deficient number, since it is larger than the sum of its proper divisors (9314706619).

91259317061 is a wasteful number, since it uses less digits than its factorization.

91259317061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41656.

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 91259317061 in words is "ninety-one billion, two hundred fifty-nine million, three hundred seventeen thousand, sixty-one".