17993994719568 has 120 divisors (see below), whose sum is σ = 54436702658400. Its totient is φ = 5106636944640.

The previous prime is 17993994719539. The next prime is 17993994719579. The reversal of 17993994719568 is 86591749939971.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25322398 + ... + 26023293.

It is an arithmetic number, because the mean of its divisors is an integer number (453639188820).

Almost surely, 2^{17993994719568} is an apocalyptic number.

It is an amenable number.

17993994719568 is an abundant number, since it is smaller than the sum of its proper divisors (36442707938832).

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

17993994719568 is a wasteful number, since it uses less digits than its factorization.

17993994719568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51345865 (or 51345852 counting only the distinct ones).

The product of its digits is 8332994880, while the sum is 87.

The spelling of 17993994719568 in words is "seventeen trillion, nine hundred ninety-three billion, nine hundred ninety-four million, seven hundred nineteen thousand, five hundred sixty-eight".