17991254260 has 24 divisors (see below), whose sum is σ = 43179010560. Its totient is φ = 6168429984.

The previous prime is 17991254257. The next prime is 17991254269. The reversal of 17991254260 is 6245219971.

It is a self number, because there is not a number n which added to its sum of digits gives 17991254260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17991254269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64254340 + ... + 64254619.

It is an arithmetic number, because the mean of its divisors is an integer number (1799125440).

Almost surely, 2^17991254260 is an apocalyptic number.

17991254260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17991254260 is an abundant number, since it is smaller than the sum of its proper divisors (25187756300).

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

17991254260 is a wasteful number, since it uses less digits than its factorization.

17991254260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128508975 (or 128508973 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 17991254260 in words is "seventeen billion, nine hundred ninety-one million, two hundred fifty-four thousand, two hundred sixty".