18541980655344 has 200 divisors, whose sum is σ = 57461150688480. Its totient is φ = 5751730778112.

The previous prime is 18541980655343. The next prime is 18541980655351. The reversal of 18541980655344 is 44355608914581.

It is a happy number.

18541980655344 is a `hidden beast` number, since 1 + 8 + 5 + 4 + 1 + 98 + 0 + 6 + 5 + 534 + 4 = 666.

It is a super-2 number, since 2×18541980655344² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18541980655343) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2767204 + ... + 6688899.

Almost surely, 2^{18541980655344} is an apocalyptic number.

It is an amenable number.

18541980655344 is an abundant number, since it is smaller than the sum of its proper divisors (38919170033136).

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

18541980655344 is a wasteful number, since it uses less digits than its factorization.

18541980655344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456229 (or 9456214 counting only the distinct ones).

The product of its (nonzero) digits is 82944000, while the sum is 63.

The spelling of 18541980655344 in words is "eighteen trillion, five hundred forty-one billion, nine hundred eighty million, six hundred fifty-five thousand, three hundred forty-four".