91744677642719 has 2 divisors, whose sum is σ = 91744677642720. Its totient is φ = 91744677642718.

The previous prime is 91744677642691. The next prime is 91744677642721. The reversal of 91744677642719 is 91724677644719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91744677642719 - 2¹² = 91744677638623 is a prime.

It is a super-2 number, since 2×91744677642719² (a number of 29 digits) contains 22 as substring.

Together with 91744677642721, 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 (91744677672719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45872338821359 + 45872338821360.

It is an arithmetic number, because the mean of its divisors is an integer number (45872338821360).

Almost surely, 2^{91744677642719} is an apocalyptic number.

91744677642719 is a deficient number, since it is larger than the sum of its proper divisors (1).

91744677642719 is an equidigital number, since it uses as much as digits as its factorization.

91744677642719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896168448, while the sum is 74.

The spelling of 91744677642719 in words is "ninety-one trillion, seven hundred forty-four billion, six hundred seventy-seven million, six hundred forty-two thousand, seven hundred nineteen".