91242618480 has 400 divisors, whose sum is σ = 349226502240. Its totient is φ = 21936531456.

The previous prime is 91242618469. The next prime is 91242618497. The reversal of 91242618480 is 8481624219.

91242618480 is a `hidden beast` number, since 9 + 1 + 24 + 2 + 618 + 4 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3609726 + ... + 3634914.

Almost surely, 2^91242618480 is an apocalyptic number.

91242618480 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91242618480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174613251120).

91242618480 is an abundant number, since it is smaller than the sum of its proper divisors (257983883760).

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

91242618480 is a wasteful number, since it uses less digits than its factorization.

91242618480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25270 (or 25255 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 91242618480 in words is "ninety-one billion, two hundred forty-two million, six hundred eighteen thousand, four hundred eighty".