11157831715511 has 4 divisors (see below), whose sum is σ = 12016126462872. Its totient is φ = 10299536968152.

The previous prime is 11157831715489. The next prime is 11157831715519. The reversal of 11157831715511 is 11551713875111.

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

It is a cyclic number.

It is not a de Polignac number, because 11157831715511 - 2¹⁴ = 11157831699127 is a prime.

It is a super-2 number, since 2×11157831715511² (a number of 27 digits) contains 22 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 (11157831715519) 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, 429147373661 + ... + 429147373686.

It is an arithmetic number, because the mean of its divisors is an integer number (3004031615718).

Almost surely, 2^{11157831715511} is an apocalyptic number.

11157831715511 is a deficient number, since it is larger than the sum of its proper divisors (858294747361).

11157831715511 is an equidigital number, since it uses as much as digits as its factorization.

11157831715511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858294747360.

The product of its digits is 147000, while the sum is 47.

The spelling of 11157831715511 in words is "eleven trillion, one hundred fifty-seven billion, eight hundred thirty-one million, seven hundred fifteen thousand, five hundred eleven".