11811318658 has 4 divisors (see below), whose sum is σ = 17716977990. Its totient is φ = 5905659328.

The previous prime is 11811318641. The next prime is 11811318683. The reversal of 11811318658 is 85681311811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85681311811 = 2137 ⋅40094203.

It can be written as a sum of positive squares in only one way, i.e., 9098679769 + 2712638889 = 95387^2 + 52083^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2952829663 + ... + 2952829666.

Almost surely, 2^11811318658 is an apocalyptic number.

11811318658 is a deficient number, since it is larger than the sum of its proper divisors (5905659332).

11811318658 is an equidigital number, since it uses as much as digits as its factorization.

11811318658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905659331.

The product of its digits is 46080, while the sum is 43.

The spelling of 11811318658 in words is "eleven billion, eight hundred eleven million, three hundred eighteen thousand, six hundred fifty-eight".