11543642523 has 24 divisors (see below), whose sum is σ = 19884703488. Its totient is φ = 6309567792.

The previous prime is 11543642507. The next prime is 11543642567. The reversal of 11543642523 is 32524634511.

11543642523 is a `hidden beast` number, since 1 + 1 + 5 + 4 + 3 + 642 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 11543642523 - 2⁴ = 11543642507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11543642023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3981865 + ... + 3984762.

It is an arithmetic number, because the mean of its divisors is an integer number (828529312).

Almost surely, 2^11543642523 is an apocalyptic number.

11543642523 is a deficient number, since it is larger than the sum of its proper divisors (8341060965).

11543642523 is a wasteful number, since it uses less digits than its factorization.

11543642523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966663 (or 7966660 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 11543642523 in words is "eleven billion, five hundred forty-three million, six hundred forty-two thousand, five hundred twenty-three".