91368936240 has 320 divisors, whose sum is σ = 305932419072. Its totient is φ = 22511001600.

The previous prime is 91368936173. The next prime is 91368936247. The reversal of 91368936240 is 4263986319.

It is not an unprimeable number, because it can be changed into a prime (91368936247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14333694 + ... + 14340066.

Almost surely, 2^91368936240 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 91368936240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152966209536).

91368936240 is an abundant number, since it is smaller than the sum of its proper divisors (214563482832).

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

91368936240 is a wasteful number, since it uses less digits than its factorization.

91368936240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6508 (or 6502 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 91368936240 in words is "ninety-one billion, three hundred sixty-eight million, nine hundred thirty-six thousand, two hundred forty".