91366150537 has 2 divisors, whose sum is σ = 91366150538. Its totient is φ = 91366150536.

The previous prime is 91366150523. The next prime is 91366150541. The reversal of 91366150537 is 73505166319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76740634441 + 14625516096 = 277021^2 + 120936^2 .

It is a cyclic number.

It is not a de Polignac number, because 91366150537 - 2²⁷ = 91231932809 is a prime.

It is not a weakly prime, because it can be changed into another prime (91366150507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45683075268 + 45683075269.

It is an arithmetic number, because the mean of its divisors is an integer number (45683075269).

Almost surely, 2^91366150537 is an apocalyptic number.

It is an amenable number.

91366150537 is a deficient number, since it is larger than the sum of its proper divisors (1).

91366150537 is an equidigital number, since it uses as much as digits as its factorization.

91366150537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 510300, while the sum is 46.

The spelling of 91366150537 in words is "ninety-one billion, three hundred sixty-six million, one hundred fifty thousand, five hundred thirty-seven".