18982551468609 has 9 divisors (see below), whose sum is σ = 27419259890113. Its totient is φ = 12655025598612.

The previous prime is 18982551468521. The next prime is 18982551468619. The reversal of 18982551468609 is 90686415528981.

The square root of 18982551468609 is 4356897.

It is a perfect power (a square), and thus also a powerful number.

18982551468609 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 2 + 5 + 5 + 1 + 4 + 6 + 8 + 609 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 18982551468609 - 2²³ = 18982543080001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18982551468619) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12344542 + ... + 13796840.

Almost surely, 2^{18982551468609} is an apocalyptic number.

18982551468609 is the 4356897-th square number.

18982551468609 is the 2178449-th centered octagonal number.

It is an amenable number.

18982551468609 is a deficient number, since it is larger than the sum of its proper divisors (8436708421504).

18982551468609 is an frugal number, since it uses more digits than its factorization.

18982551468609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904604 (or 1452302 counting only the distinct ones).

The product of its (nonzero) digits is 298598400, while the sum is 72.

The spelling of 18982551468609 in words is "eighteen trillion, nine hundred eighty-two billion, five hundred fifty-one million, four hundred sixty-eight thousand, six hundred nine".