18331617317757 has 32 divisors (see below), whose sum is σ = 24594271543296. Its totient is φ = 12145159910400.

The previous prime is 18331617317707. The next prime is 18331617317771. The reversal of 18331617317757 is 75771371613381.

It is not a de Polignac number, because 18331617317757 - 2²⁰ = 18331616269181 is a prime.

It is a super-2 number, since 2×18331617317757² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18331617317757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18331617317707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3456836368 + ... + 3456841670.

It is an arithmetic number, because the mean of its divisors is an integer number (768570985728).

Almost surely, 2^{18331617317757} is an apocalyptic number.

It is an amenable number.

18331617317757 is a deficient number, since it is larger than the sum of its proper divisors (6262654225539).

18331617317757 is a wasteful number, since it uses less digits than its factorization.

18331617317757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561.

The product of its digits is 15558480, while the sum is 60.

The spelling of 18331617317757 in words is "eighteen trillion, three hundred thirty-one billion, six hundred seventeen million, three hundred seventeen thousand, seven hundred fifty-seven".