91813263360 has 384 divisors, whose sum is σ = 361525731840. Its totient is φ = 19370999808.

The previous prime is 91813263341. The next prime is 91813263379. The reversal of 91813263360 is 6336231819.

It is an interprime number because it is at equal distance from previous prime (91813263341) and next prime (91813263379).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2779099 + ... + 2811941.

It is an arithmetic number, because the mean of its divisors is an integer number (941473260).

Almost surely, 2^91813263360 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 91813263360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180762865920).

91813263360 is an abundant number, since it is smaller than the sum of its proper divisors (269712468480).

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

91813263360 is a wasteful number, since it uses less digits than its factorization.

91813263360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32893 (or 32873 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 91813263360 in words is "ninety-one billion, eight hundred thirteen million, two hundred sixty-three thousand, three hundred sixty".