655223510530644 has 72 divisors (see below), whose sum is σ = 1681069180759584. Its totient is φ = 198482590891200.

The previous prime is 655223510530627. The next prime is 655223510530681. The reversal of 655223510530644 is 446035015322556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75411142 + ... + 83649789.

Almost surely, 2^{655223510530644} is an apocalyptic number.

It is an amenable number.

655223510530644 is an abundant number, since it is smaller than the sum of its proper divisors (1025845670228940).

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

655223510530644 is a wasteful number, since it uses less digits than its factorization.

655223510530644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159063797 (or 159063784 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 51.

The spelling of 655223510530644 in words is "six hundred fifty-five trillion, two hundred twenty-three billion, five hundred ten million, five hundred thirty thousand, six hundred forty-four".