11808161131 has 4 divisors (see below), whose sum is σ = 12716481232. Its totient is φ = 10899841032.

The previous prime is 11808161119. The next prime is 11808161143. The reversal of 11808161131 is 13116180811.

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

It is an interprime number because it is at equal distance from previous prime (11808161119) and next prime (11808161143).

It is a cyclic number.

It is not a de Polignac number, because 11808161131 - 2⁹ = 11808160619 is a prime.

It is a super-2 number, since 2×11808161131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11808161093 and 11808161102.

It is not an unprimeable number, because it can be changed into a prime (11803161131) 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, 454160031 + ... + 454160056.

It is an arithmetic number, because the mean of its divisors is an integer number (3179120308).

Almost surely, 2^11808161131 is an apocalyptic number.

11808161131 is a deficient number, since it is larger than the sum of its proper divisors (908320101).

11808161131 is an equidigital number, since it uses as much as digits as its factorization.

11808161131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908320100.

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 11808161131 in words is "eleven billion, eight hundred eight million, one hundred sixty-one thousand, one hundred thirty-one".