91254945812 has 24 divisors (see below), whose sum is σ = 160071930816. Its totient is φ = 45520187328.

The previous prime is 91254945791. The next prime is 91254945883. The reversal of 91254945812 is 21854945219.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5499953 + ... + 5516519.

It is an arithmetic number, because the mean of its divisors is an integer number (6669663784).

Almost surely, 2^91254945812 is an apocalyptic number.

It is an amenable number.

91254945812 is a deficient number, since it is larger than the sum of its proper divisors (68816985004).

91254945812 is a wasteful number, since it uses less digits than its factorization.

91254945812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19727 (or 19725 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 50.

The spelling of 91254945812 in words is "ninety-one billion, two hundred fifty-four million, nine hundred forty-five thousand, eight hundred twelve".