11782531243 has 16 divisors (see below), whose sum is σ = 13903912960. Its totient is φ = 9770868000.

The previous prime is 11782531231. The next prime is 11782531261. The reversal of 11782531243 is 34213528711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11782531243 is a prime.

It is a super-2 number, since 2×11782531243² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11782531273) 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, 1477918 + ... + 1485868.

It is an arithmetic number, because the mean of its divisors is an integer number (868994560).

Almost surely, 2^11782531243 is an apocalyptic number.

11782531243 is a deficient number, since it is larger than the sum of its proper divisors (2121381717).

11782531243 is an equidigital number, since it uses as much as digits as its factorization.

11782531243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14818.

The product of its digits is 40320, while the sum is 37.

The spelling of 11782531243 in words is "eleven billion, seven hundred eighty-two million, five hundred thirty-one thousand, two hundred forty-three".