1118556418637 has 12 divisors (see below), whose sum is σ = 1301616298620. Its totient is φ = 958439595456.

The previous prime is 1118556418621. The next prime is 1118556418643. The reversal of 1118556418637 is 7368146558111.

It can be written as a sum of positive squares in 2 ways, for example, as 543915100036 + 574641318601 = 737506^2 + 758051^2 .

It is not a de Polignac number, because 1118556418637 - 2⁴ = 1118556418621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118556412637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3698858 + ... + 3989819.

It is an arithmetic number, because the mean of its divisors is an integer number (108468024885).

Almost surely, 2^{1118556418637} is an apocalyptic number.

It is an amenable number.

1118556418637 is a deficient number, since it is larger than the sum of its proper divisors (183059879983).

1118556418637 is an equidigital number, since it uses as much as digits as its factorization.

1118556418637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7691660 (or 7691653 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 56.

The spelling of 1118556418637 in words is "one trillion, one hundred eighteen billion, five hundred fifty-six million, four hundred eighteen thousand, six hundred thirty-seven".