1868136458 has 8 divisors (see below), whose sum is σ = 2802919140. Its totient is φ = 933830080.

The previous prime is 1868136437. The next prime is 1868136469. The reversal of 1868136458 is 8546318681.

It can be written as a sum of positive squares in 2 ways, for example, as 1851839089 + 16297369 = 43033^2 + 4037^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109103 + ... + 125058.

Almost surely, 2^1868136458 is an apocalyptic number.

1868136458 is a deficient number, since it is larger than the sum of its proper divisors (934782682).

1868136458 is a wasteful number, since it uses less digits than its factorization.

1868136458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238152.

The product of its digits is 1105920, while the sum is 50.

The square root of 1868136458 is about 43221.9441719134. The cubic root of 1868136458 is about 1231.5995797187.

The spelling of 1868136458 in words is "one billion, eight hundred sixty-eight million, one hundred thirty-six thousand, four hundred fifty-eight".