11157831731826 has 48 divisors (see below), whose sum is σ = 26035334573976. Its totient is φ = 3433127056128.

The previous prime is 11157831731821. The next prime is 11157831731843. The reversal of 11157831731826 is 62813713875111.

11157831731826 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 7 + 8 + 317 + 318 + 2 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10107954848601 + 1049876883225 = 3179301^2 + 1024635^2 .

It is not an unprimeable number, because it can be changed into a prime (11157831731821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16901566 + ... + 17549318.

Almost surely, 2^{11157831731826} is an apocalyptic number.

11157831731826 is an abundant number, since it is smaller than the sum of its proper divisors (14877502842150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11157831731826 is a wasteful number, since it uses less digits than its factorization.

11157831731826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721387 (or 721384 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The spelling of 11157831731826 in words is "eleven trillion, one hundred fifty-seven billion, eight hundred thirty-one million, seven hundred thirty-one thousand, eight hundred twenty-six".