2118087557569 has 8 divisors (see below), whose sum is σ = 2137695350120. Its totient is φ = 2098482961536.

The previous prime is 2118087557543. The next prime is 2118087557581. The reversal of 2118087557569 is 9657557808112.

It can be written as a sum of positive squares in 4 ways, for example, as 546416640000 + 1571670917569 = 739200^2 + 1253663^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2118087557569 - 2²⁷ = 2117953339841 is a prime.

It is a super-2 number, since 2×2118087557569² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2118087557569.

It is not an unprimeable number, because it can be changed into a prime (2118087557269) 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, 542629 + ... + 2128525.

It is an arithmetic number, because the mean of its divisors is an integer number (267211918765).

Almost surely, 2^{2118087557569} is an apocalyptic number.

It is an amenable number.

2118087557569 is a deficient number, since it is larger than the sum of its proper divisors (19607792551).

2118087557569 is a wasteful number, since it uses less digits than its factorization.

2118087557569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598259.

The product of its (nonzero) digits is 42336000, while the sum is 64.

The spelling of 2118087557569 in words is "two trillion, one hundred eighteen billion, eighty-seven million, five hundred fifty-seven thousand, five hundred sixty-nine".