18553381911259 has 16 divisors (see below), whose sum is σ = 20101523984640. Its totient is φ = 17022533093280.

The previous prime is 18553381911241. The next prime is 18553381911293. The reversal of 18553381911259 is 95211918335581.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18553381911259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18553381911197 and 18553381911206.

It is not an unprimeable number, because it can be changed into a prime (18553381911059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33880372 + ... + 34423630.

It is an arithmetic number, because the mean of its divisors is an integer number (1256345249040).

Almost surely, 2^{18553381911259} is an apocalyptic number.

18553381911259 is a deficient number, since it is larger than the sum of its proper divisors (1548142073381).

18553381911259 is a wasteful number, since it uses less digits than its factorization.

18553381911259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559170.

The product of its digits is 11664000, while the sum is 61.

The spelling of 18553381911259 in words is "eighteen trillion, five hundred fifty-three billion, three hundred eighty-one million, nine hundred eleven thousand, two hundred fifty-nine".