91653669440 has 112 divisors (see below), whose sum is σ = 239057535600. Its totient is φ = 33315028992.

The previous prime is 91653669439. The next prime is 91653669451. The reversal of 91653669440 is 4496635619.

It can be written as a sum of positive squares in 8 ways, for example, as 3909750784 + 87743918656 = 62528^2 + 296216^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132725 + ... + 448244.

Almost surely, 2^91653669440 is an apocalyptic number.

It is an amenable number.

91653669440 is an abundant number, since it is smaller than the sum of its proper divisors (147403866160).

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

91653669440 is a wasteful number, since it uses less digits than its factorization.

91653669440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581032 (or 581022 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 91653669440 in words is "ninety-one billion, six hundred fifty-three million, six hundred sixty-nine thousand, four hundred forty".