91909595444 has 6 divisors (see below), whose sum is σ = 160841792034. Its totient is φ = 45954797720.

The previous prime is 91909595443. The next prime is 91909595471. The reversal of 91909595444 is 44459590919.

It can be written as a sum of positive squares in only one way, i.e., 68565422500 + 23344172944 = 261850^2 + 152788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91909595443) 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, 11488699427 + ... + 11488699434.

It is an arithmetic number, because the mean of its divisors is an integer number (26806965339).

Almost surely, 2^91909595444 is an apocalyptic number.

It is an amenable number.

91909595444 is a deficient number, since it is larger than the sum of its proper divisors (68932196590).

91909595444 is a wasteful number, since it uses less digits than its factorization.

91909595444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22977398865 (or 22977398863 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 91909595444 in words is "ninety-one billion, nine hundred nine million, five hundred ninety-five thousand, four hundred forty-four".