91145926877 has 2 divisors, whose sum is σ = 91145926878. Its totient is φ = 91145926876.

The previous prime is 91145926841. The next prime is 91145926909. The reversal of 91145926877 is 77862954119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90922753156 + 223173721 = 301534^2 + 14939^2 .

It is a cyclic number.

It is not a de Polignac number, because 91145926877 - 2¹⁶ = 91145861341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91145926477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45572963438 + 45572963439.

It is an arithmetic number, because the mean of its divisors is an integer number (45572963439).

Almost surely, 2^91145926877 is an apocalyptic number.

It is an amenable number.

91145926877 is a deficient number, since it is larger than the sum of its proper divisors (1).

91145926877 is an equidigital number, since it uses as much as digits as its factorization.

91145926877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 59.

The spelling of 91145926877 in words is "ninety-one billion, one hundred forty-five million, nine hundred twenty-six thousand, eight hundred seventy-seven".