91164012559 has 2 divisors, whose sum is σ = 91164012560. Its totient is φ = 91164012558.

The previous prime is 91164012479. The next prime is 91164012593. The reversal of 91164012559 is 95521046119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91164012559 - 2³³ = 82574077967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91164013559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45582006279 + 45582006280.

It is an arithmetic number, because the mean of its divisors is an integer number (45582006280).

Almost surely, 2^91164012559 is an apocalyptic number.

91164012559 is a deficient number, since it is larger than the sum of its proper divisors (1).

91164012559 is an equidigital number, since it uses as much as digits as its factorization.

91164012559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 91164012559 in words is "ninety-one billion, one hundred sixty-four million, twelve thousand, five hundred fifty-nine".