11418851957 has 4 divisors (see below), whose sum is σ = 11421645900. Its totient is φ = 11416058016.

The previous prime is 11418851921. The next prime is 11418851999. The reversal of 11418851957 is 75915881411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2277771076 + 9141080881 = 47726^2 + 95609^2 .

It is a cyclic number.

It is not a de Polignac number, because 11418851957 - 2⁶ = 11418851893 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 (11418851557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390832 + ... + 1399017.

It is an arithmetic number, because the mean of its divisors is an integer number (2855411475).

Almost surely, 2^11418851957 is an apocalyptic number.

It is an amenable number.

11418851957 is a deficient number, since it is larger than the sum of its proper divisors (2793943).

11418851957 is an equidigital number, since it uses as much as digits as its factorization.

11418851957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793942.

The product of its digits is 403200, while the sum is 50.

The spelling of 11418851957 in words is "eleven billion, four hundred eighteen million, eight hundred fifty-one thousand, nine hundred fifty-seven".