11652543561 has 4 divisors (see below), whose sum is σ = 15536724752. Its totient is φ = 7768362372.

The previous prime is 11652543547. The next prime is 11652543629. The reversal of 11652543561 is 16534525611.

11652543561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11652543561 - 2¹⁴ = 11652527177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11652543541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1942090591 + ... + 1942090596.

It is an arithmetic number, because the mean of its divisors is an integer number (3884181188).

Almost surely, 2^11652543561 is an apocalyptic number.

It is an amenable number.

11652543561 is a deficient number, since it is larger than the sum of its proper divisors (3884181191).

11652543561 is an equidigital number, since it uses as much as digits as its factorization.

11652543561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884181190.

The product of its digits is 108000, while the sum is 39.

The spelling of 11652543561 in words is "eleven billion, six hundred fifty-two million, five hundred forty-three thousand, five hundred sixty-one".