9091021495680 has 320 divisors, whose sum is σ = 33877234908000. Its totient is φ = 2318868946944.

The previous prime is 9091021495639. The next prime is 9091021495711. The reversal of 9091021495680 is 865941201909.

9091021495680 is a `hidden beast` number, since 9 + 0 + 9 + 10 + 21 + 49 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2620005 + ... + 5004644.

Almost surely, 2^{9091021495680} is an apocalyptic number.

9091021495680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9091021495680 is an abundant number, since it is smaller than the sum of its proper divisors (24786213412320).

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

9091021495680 is a wasteful number, since it uses less digits than its factorization.

9091021495680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7624703 (or 7624682 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 9091021495680 in words is "nine trillion, ninety-one billion, twenty-one million, four hundred ninety-five thousand, six hundred eighty".