91490874240 has 256 divisors, whose sum is σ = 295440307200. Its totient is φ = 24080179200.

The previous prime is 91490874191. The next prime is 91490874253. The reversal of 91490874240 is 4247809419.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 91490874240.

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, 89784451 + ... + 89785469.

It is an arithmetic number, because the mean of its divisors is an integer number (1154063700).

Almost surely, 2^91490874240 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 91490874240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147720153600).

91490874240 is an abundant number, since it is smaller than the sum of its proper divisors (203949432960).

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

91490874240 is a wasteful number, since it uses less digits than its factorization.

91490874240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1593 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 91490874240 in words is "ninety-one billion, four hundred ninety million, eight hundred seventy-four thousand, two hundred forty".