11871351157 has 4 divisors (see below), whose sum is σ = 11877677676. Its totient is φ = 11865024640.

The previous prime is 11871351139. The next prime is 11871351187. The reversal of 11871351157 is 75115317811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75115317811 = 14717 ⋅5103983.

It can be written as a sum of positive squares in 2 ways, for example, as 4795008516 + 7076342641 = 69246^2 + 84121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11871351157 is a prime.

It is a super-3 number, since 3×11871351157³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11871351137) 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, 3160444 + ... + 3164197.

It is an arithmetic number, because the mean of its divisors is an integer number (2969419419).

Almost surely, 2^11871351157 is an apocalyptic number.

It is an amenable number.

11871351157 is a deficient number, since it is larger than the sum of its proper divisors (6326519).

11871351157 is an equidigital number, since it uses as much as digits as its factorization.

11871351157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326518.

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

Adding to 11871351157 its reverse (75115317811), we get a palindrome (86986668968).

The spelling of 11871351157 in words is "eleven billion, eight hundred seventy-one million, three hundred fifty-one thousand, one hundred fifty-seven".