91275197444 has 12 divisors (see below), whose sum is σ = 159734946000. Its totient is φ = 45636641448.

The previous prime is 91275197441. The next prime is 91275197467. The reversal of 91275197444 is 44479157219.

It is not an unprimeable number, because it can be changed into a prime (91275197441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2327 + ... + 427265.

It is an arithmetic number, because the mean of its divisors is an integer number (13311245500).

Almost surely, 2^91275197444 is an apocalyptic number.

It is an amenable number.

91275197444 is a deficient number, since it is larger than the sum of its proper divisors (68459748556).

91275197444 is a wasteful number, since it uses less digits than its factorization.

91275197444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478642 (or 478640 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The spelling of 91275197444 in words is "ninety-one billion, two hundred seventy-five million, one hundred ninety-seven thousand, four hundred forty-four".