17991492280 has 16 divisors (see below), whose sum is σ = 40480857720. Its totient is φ = 7196596896.

The previous prime is 17991492269. The next prime is 17991492319. The reversal of 17991492280 is 8229419971.

It is a super-2 number, since 2×17991492280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224893614 + ... + 224893693.

Almost surely, 2^17991492280 is an apocalyptic number.

17991492280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17991492280 is an abundant number, since it is smaller than the sum of its proper divisors (22489365440).

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

17991492280 is a wasteful number, since it uses less digits than its factorization.

17991492280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449787318 (or 449787314 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 17991492280 in words is "seventeen billion, nine hundred ninety-one million, four hundred ninety-two thousand, two hundred eighty".