91305366648 has 32 divisors (see below), whose sum is σ = 235626754560. Its totient is φ = 29453343840.

The previous prime is 91305366619. The next prime is 91305366661. The reversal of 91305366648 is 84666350319.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91305366648.

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, 61360390 + ... + 61361877.

It is an arithmetic number, because the mean of its divisors is an integer number (7363336080).

Almost surely, 2^91305366648 is an apocalyptic number.

It is an amenable number.

91305366648 is an abundant number, since it is smaller than the sum of its proper divisors (144321387912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91305366648 is a wasteful number, since it uses less digits than its factorization.

91305366648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122722307 (or 122722303 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 91305366648 in words is "ninety-one billion, three hundred five million, three hundred sixty-six thousand, six hundred forty-eight".