11851311757 has 4 divisors (see below), whose sum is σ = 11855725056. Its totient is φ = 11846898460.

The previous prime is 11851311721. The next prime is 11851311781. The reversal of 11851311757 is 75711315811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11851311757 - 2⁷ = 11851311629 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11851311707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202619 + ... + 2207992.

It is an arithmetic number, because the mean of its divisors is an integer number (2963931264).

Almost surely, 2^11851311757 is an apocalyptic number.

It is an amenable number.

11851311757 is a deficient number, since it is larger than the sum of its proper divisors (4413299).

11851311757 is an equidigital number, since it uses as much as digits as its factorization.

11851311757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413298.

The product of its digits is 29400, while the sum is 40.

The spelling of 11851311757 in words is "eleven billion, eight hundred fifty-one million, three hundred eleven thousand, seven hundred fifty-seven".