91775064649994 has 16 divisors (see below), whose sum is σ = 158081451072480. Its totient is φ = 39520362767760.

The previous prime is 91775064649993. The next prime is 91775064650023. The reversal of 91775064649994 is 49994646057719.

It is not an unprimeable number, because it can be changed into a prime (91775064649993) 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 in 7 ways as a sum of consecutive naturals, for example, 109778785049 + ... + 109778785884.

It is an arithmetic number, because the mean of its divisors is an integer number (9880090692030).

Almost surely, 2^{91775064649994} is an apocalyptic number.

91775064649994 is a deficient number, since it is larger than the sum of its proper divisors (66306386422486).

91775064649994 is a wasteful number, since it uses less digits than its factorization.

91775064649994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219557570965.

The product of its (nonzero) digits is 3703553280, while the sum is 80.

The spelling of 91775064649994 in words is "ninety-one trillion, seven hundred seventy-five billion, sixty-four million, six hundred forty-nine thousand, nine hundred ninety-four".