23561355564 has 36 divisors (see below), whose sum is σ = 63061276824. Its totient is φ = 7391797632.

The previous prime is 23561355563. The next prime is 23561355577. The reversal of 23561355564 is 46555316532.

23561355564 is a `hidden beast` number, since 2 + 3 + 5 + 61 + 35 + 556 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (23561355563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19248862 + ... + 19250085.

It is an arithmetic number, because the mean of its divisors is an integer number (1751702134).

Almost surely, 2^23561355564 is an apocalyptic number.

It is an amenable number.

23561355564 is an abundant number, since it is smaller than the sum of its proper divisors (39499921260).

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

23561355564 is a wasteful number, since it uses less digits than its factorization.

23561355564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38498974 (or 38498969 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 45.

The spelling of 23561355564 in words is "twenty-three billion, five hundred sixty-one million, three hundred fifty-five thousand, five hundred sixty-four".