91455009656 has 8 divisors (see below), whose sum is σ = 171478143120. Its totient is φ = 45727504824.

The previous prime is 91455009601. The next prime is 91455009661. The reversal of 91455009656 is 65690055419.

It is a happy number.

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, 5715938096 + ... + 5715938111.

It is an arithmetic number, because the mean of its divisors is an integer number (21434767890).

Almost surely, 2^91455009656 is an apocalyptic number.

It is an amenable number.

91455009656 is a deficient number, since it is larger than the sum of its proper divisors (80023133464).

91455009656 is a wasteful number, since it uses less digits than its factorization.

91455009656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11431876213 (or 11431876209 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 91455009656 in words is "ninety-one billion, four hundred fifty-five million, nine thousand, six hundred fifty-six".