18880561017 has 6 divisors (see below), whose sum is σ = 27271921482. Its totient is φ = 12587040672.

The previous prime is 18880560991. The next prime is 18880561019. The reversal of 18880561017 is 71016508881.

18880561017 is a `hidden beast` number, since 1 + 8 + 8 + 80 + 561 + 0 + 1 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16696774656 + 2183786361 = 129216^2 + 46731^2 .

It is not a de Polignac number, because 18880561017 - 2¹⁹ = 18880036729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18880561019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1048920048 + ... + 1048920065.

It is an arithmetic number, because the mean of its divisors is an integer number (4545320247).

Almost surely, 2^18880561017 is an apocalyptic number.

It is an amenable number.

18880561017 is a deficient number, since it is larger than the sum of its proper divisors (8391360465).

18880561017 is a wasteful number, since it uses less digits than its factorization.

18880561017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097840119 (or 2097840116 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The spelling of 18880561017 in words is "eighteen billion, eight hundred eighty million, five hundred sixty-one thousand, seventeen".