91536670368 has 864 divisors, whose sum is σ = 326369691648. Its totient is φ = 24141680640.

The previous prime is 91536670363. The next prime is 91536670373. The reversal of 91536670368 is 86307663519.

91536670368 is a `hidden beast` number, since 9 + 1 + 536 + 6 + 70 + 36 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (91536670363) and next prime (91536670373).

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (91536670363) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 720761121 + ... + 720761247.

Almost surely, 2^91536670368 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 91536670368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163184845824).

91536670368 is an abundant number, since it is smaller than the sum of its proper divisors (234833021280).

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

91536670368 is a wasteful number, since it uses less digits than its factorization.

91536670368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 91536670368 in words is "ninety-one billion, five hundred thirty-six million, six hundred seventy thousand, three hundred sixty-eight".