18570556845 has 96 divisors (see below), whose sum is σ = 35022544128. Its totient is φ = 9077612544.

The previous prime is 18570556831. The next prime is 18570556847. The reversal of 18570556845 is 54865507581.

18570556845 is a `hidden beast` number, since 1 + 8 + 5 + 7 + 0 + 556 + 84 + 5 = 666.

It is not a de Polignac number, because 18570556845 - 2¹⁶ = 18570491309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18570556791 and 18570556800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18570556847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2354829 + ... + 2362701.

It is an arithmetic number, because the mean of its divisors is an integer number (364818168).

Almost surely, 2^18570556845 is an apocalyptic number.

18570556845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18570556845 is a deficient number, since it is larger than the sum of its proper divisors (16451987283).

18570556845 is a wasteful number, since it uses less digits than its factorization.

18570556845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003 (or 8000 counting only the distinct ones).

The product of its (nonzero) digits is 6720000, while the sum is 54.

The spelling of 18570556845 in words is "eighteen billion, five hundred seventy million, five hundred fifty-six thousand, eight hundred forty-five".