2118913658 has 16 divisors (see below), whose sum is σ = 3198052584. Its totient is φ = 1052916480.

The previous prime is 2118913639. The next prime is 2118913697. The reversal of 2118913658 is 8563198112.

It can be written as a sum of positive squares in 4 ways, for example, as 1632402409 + 486511249 = 40403^2 + 22057^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 218366 + ... + 227862.

Almost surely, 2^2118913658 is an apocalyptic number.

2118913658 is a deficient number, since it is larger than the sum of its proper divisors (1079138926).

2118913658 is a wasteful number, since it uses less digits than its factorization.

2118913658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177.

The product of its digits is 103680, while the sum is 44.

The square root of 2118913658 is about 46031.6593009637. The cubic root of 2118913658 is about 1284.4121942276.

The spelling of 2118913658 in words is "two billion, one hundred eighteen million, nine hundred thirteen thousand, six hundred fifty-eight".