11543784623 has 16 divisors (see below), whose sum is σ = 13553633280. Its totient is φ = 9624285216.

The previous prime is 11543784611. The next prime is 11543784649. The reversal of 11543784623 is 32648734511.

It is a happy number.

It is not a de Polignac number, because 11543784623 - 2¹⁶ = 11543719087 is a prime.

It is a super-2 number, since 2×11543784623² (a number of 21 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 (11543784673) 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, 1363040 + ... + 1371482.

It is an arithmetic number, because the mean of its divisors is an integer number (847102080).

Almost surely, 2^11543784623 is an apocalyptic number.

11543784623 is a deficient number, since it is larger than the sum of its proper divisors (2009848657).

11543784623 is an equidigital number, since it uses as much as digits as its factorization.

11543784623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13766.

The product of its digits is 483840, while the sum is 44.

The spelling of 11543784623 in words is "eleven billion, five hundred forty-three million, seven hundred eighty-four thousand, six hundred twenty-three".