91263917464 has 8 divisors (see below), whose sum is σ = 171119845260. Its totient is φ = 45631958728.

The previous prime is 91263917449. The next prime is 91263917497. The reversal of 91263917464 is 46471936219.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5703994834 + ... + 5703994849.

Almost surely, 2^91263917464 is an apocalyptic number.

It is an amenable number.

91263917464 is a deficient number, since it is larger than the sum of its proper divisors (79855927796).

91263917464 is a wasteful number, since it uses less digits than its factorization.

91263917464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11407989689 (or 11407989685 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The spelling of 91263917464 in words is "ninety-one billion, two hundred sixty-three million, nine hundred seventeen thousand, four hundred sixty-four".