91653884520 has 512 divisors, whose sum is σ = 316932341760. Its totient is φ = 21178291200.

The previous prime is 91653884467. The next prime is 91653884537. The reversal of 91653884520 is 2548835619.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 529791154 + ... + 529791326.

It is an arithmetic number, because the mean of its divisors is an integer number (619008480).

Almost surely, 2^91653884520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91653884520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158466170880).

91653884520 is an abundant number, since it is smaller than the sum of its proper divisors (225278457240).

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

91653884520 is a wasteful number, since it uses less digits than its factorization.

91653884520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 91653884520 in words is "ninety-one billion, six hundred fifty-three million, eight hundred eighty-four thousand, five hundred twenty".