91164925919 has 2 divisors, whose sum is σ = 91164925920. Its totient is φ = 91164925918.

The previous prime is 91164925853. The next prime is 91164925931. The reversal of 91164925919 is 91952946119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91164925919 - 2³⁶ = 22445449183 is a prime.

It is a super-2 number, since 2×91164925919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91164928919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45582462959 + 45582462960.

It is an arithmetic number, because the mean of its divisors is an integer number (45582462960).

Almost surely, 2^91164925919 is an apocalyptic number.

91164925919 is a deficient number, since it is larger than the sum of its proper divisors (1).

91164925919 is an equidigital number, since it uses as much as digits as its factorization.

91164925919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 56.

The spelling of 91164925919 in words is "ninety-one billion, one hundred sixty-four million, nine hundred twenty-five thousand, nine hundred nineteen".