11781131313 has 16 divisors (see below), whose sum is σ = 17961854976. Its totient is φ = 6728454480.

The previous prime is 11781131293. The next prime is 11781131377. The reversal of 11781131313 is 31313118711.

It is not a de Polignac number, because 11781131313 - 2⁸ = 11781131057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11781130313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110631 + ... + 189212.

It is an arithmetic number, because the mean of its divisors is an integer number (1122615936).

Almost surely, 2^11781131313 is an apocalyptic number.

It is an amenable number.

11781131313 is a deficient number, since it is larger than the sum of its proper divisors (6180723663).

11781131313 is a wasteful number, since it uses less digits than its factorization.

11781131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301724.

The product of its digits is 1512, while the sum is 30.

The spelling of 11781131313 in words is "eleven billion, seven hundred eighty-one million, one hundred thirty-one thousand, three hundred thirteen".