91637072767 has 2 divisors, whose sum is σ = 91637072768. Its totient is φ = 91637072766.

The previous prime is 91637072749. The next prime is 91637072777. The reversal of 91637072767 is 76727073619.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91637072767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91637072777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45818536383 + 45818536384.

It is an arithmetic number, because the mean of its divisors is an integer number (45818536384).

Almost surely, 2^91637072767 is an apocalyptic number.

91637072767 is a deficient number, since it is larger than the sum of its proper divisors (1).

91637072767 is an equidigital number, since it uses as much as digits as its factorization.

91637072767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4667544, while the sum is 55.

The spelling of 91637072767 in words is "ninety-one billion, six hundred thirty-seven million, seventy-two thousand, seven hundred sixty-seven".