11561435564 has 12 divisors (see below), whose sum is σ = 23122871184. Its totient is φ = 4954900944.

The previous prime is 11561435563. The next prime is 11561435573. The reversal of 11561435564 is 46553416511.

11561435564 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11561435563) 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, 206454179 + ... + 206454234.

It is an arithmetic number, because the mean of its divisors is an integer number (1926905932).

Almost surely, 2^11561435564 is an apocalyptic number.

11561435564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11561435564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11561435564 is a wasteful number, since it uses less digits than its factorization.

11561435564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412908424 (or 412908422 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The spelling of 11561435564 in words is "eleven billion, five hundred sixty-one million, four hundred thirty-five thousand, five hundred sixty-four".