91380096775 has 12 divisors (see below), whose sum is σ = 123612349464. Its totient is φ = 66458252000.

The previous prime is 91380096761. The next prime is 91380096791. The reversal of 91380096775 is 57769008319.

It is a de Polignac number, because none of the positive numbers 2^k-91380096775 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166145356 + ... + 166145905.

It is an arithmetic number, because the mean of its divisors is an integer number (10301029122).

Almost surely, 2^91380096775 is an apocalyptic number.

91380096775 is a deficient number, since it is larger than the sum of its proper divisors (32232252689).

91380096775 is a wasteful number, since it uses less digits than its factorization.

91380096775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332291282 (or 332291277 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 55.

The spelling of 91380096775 in words is "ninety-one billion, three hundred eighty million, ninety-six thousand, seven hundred seventy-five".