240221856564 has 18 divisors (see below), whose sum is σ = 607227470850. Its totient is φ = 80073952176.

The previous prime is 240221856559. The next prime is 240221856587. The reversal of 240221856564 is 465658122042.

240221856564 is a `hidden beast` number, since 2 + 4 + 0 + 2 + 2 + 1 + 85 + 6 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 145916360100 + 94305496464 = 381990^2 + 307092^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3336414639 + ... + 3336414710.

Almost surely, 2^240221856564 is an apocalyptic number.

It is an amenable number.

240221856564 is an abundant number, since it is smaller than the sum of its proper divisors (367005614286).

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

240221856564 is a wasteful number, since it uses less digits than its factorization.

240221856564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672829359 (or 6672829354 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 240221856564 in words is "two hundred forty billion, two hundred twenty-one million, eight hundred fifty-six thousand, five hundred sixty-four".