18559358361 has 10 divisors (see below), whose sum is σ = 27724473722. Its totient is φ = 12372905520.

The previous prime is 18559358351. The next prime is 18559358381. The reversal of 18559358361 is 16385395581.

18559358361 is a `hidden beast` number, since 1 + 8 + 5 + 59 + 3 + 583 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16197398361 + 2361960000 = 127269^2 + 48600^2 .

It is not a de Polignac number, because 18559358361 - 2⁶ = 18559358297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18559358298 and 18559358307.

It is not an unprimeable number, because it can be changed into a prime (18559358351) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 114563860 + ... + 114564021.

Almost surely, 2^18559358361 is an apocalyptic number.

It is an amenable number.

18559358361 is a deficient number, since it is larger than the sum of its proper divisors (9165115361).

18559358361 is an equidigital number, since it uses as much as digits as its factorization.

18559358361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229127893 (or 229127884 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 54.

The spelling of 18559358361 in words is "eighteen billion, five hundred fifty-nine million, three hundred fifty-eight thousand, three hundred sixty-one".