18661755160 has 128 divisors (see below), whose sum is σ = 45397195200. Its totient is φ = 6881034240.

The previous prime is 18661755143. The next prime is 18661755163. The reversal of 18661755160 is 6155716681.

It is a super-2 number, since 2×18661755160² (a number of 21 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 18661755160.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18661755163) 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, 19100592 + ... + 19101568.

Almost surely, 2^18661755160 is an apocalyptic number.

18661755160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18661755160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22698597600).

18661755160 is an abundant number, since it is smaller than the sum of its proper divisors (26735440040).

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

18661755160 is a wasteful number, since it uses less digits than its factorization.

18661755160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 18661755160 in words is "eighteen billion, six hundred sixty-one million, seven hundred fifty-five thousand, one hundred sixty".