18557919455129 has 8 divisors (see below), whose sum is σ = 18862383388680. Its totient is φ = 18253463126400.

The previous prime is 18557919455111. The next prime is 18557919455143. The reversal of 18557919455129 is 92155491975581.

It can be written as a sum of positive squares in 4 ways, for example, as 1397778904729 + 17160140550400 = 1182277^2 + 4142480^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18557919455129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18557919455329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3127619 + ... + 6848199.

It is an arithmetic number, because the mean of its divisors is an integer number (2357797923585).

Almost surely, 2^{18557919455129} is an apocalyptic number.

It is an amenable number.

18557919455129 is a deficient number, since it is larger than the sum of its proper divisors (304463933551).

18557919455129 is an equidigital number, since it uses as much as digits as its factorization.

18557919455129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802411.

The product of its digits is 204120000, while the sum is 71.

The spelling of 18557919455129 in words is "eighteen trillion, five hundred fifty-seven billion, nine hundred nineteen million, four hundred fifty-five thousand, one hundred twenty-nine".