91657093511 has 2 divisors, whose sum is σ = 91657093512. Its totient is φ = 91657093510.

The previous prime is 91657093471. The next prime is 91657093513. The reversal of 91657093511 is 11539075619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91657093511 - 2¹⁸ = 91656831367 is a prime.

Together with 91657093513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91657093513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45828546755 + 45828546756.

It is an arithmetic number, because the mean of its divisors is an integer number (45828546756).

Almost surely, 2^91657093511 is an apocalyptic number.

91657093511 is a deficient number, since it is larger than the sum of its proper divisors (1).

91657093511 is an equidigital number, since it uses as much as digits as its factorization.

91657093511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 47.

The spelling of 91657093511 in words is "ninety-one billion, six hundred fifty-seven million, ninety-three thousand, five hundred eleven".