899242544656 has 15 divisors (see below), whose sum is σ = 1742289779503. Its totient is φ = 449619375760.

The previous prime is 899242544621. The next prime is 899242544731. The reversal of 899242544656 is 656445242998.

It is a happy number.

The square root of 899242544656 is 948284.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3674601 + ... + 3911671.

Almost surely, 2^899242544656 is an apocalyptic number.

899242544656 is the 948284-th square number.

It is an amenable number.

899242544656 is a deficient number, since it is larger than the sum of its proper divisors (843047234847).

899242544656 is an frugal number, since it uses more digits than its factorization.

899242544656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474150 (or 237073 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 64.

Multiplying 899242544656 by its sum of digits (64), we get a square (57551522857984 = 7586272²).

The spelling of 899242544656 in words is "eight hundred ninety-nine billion, two hundred forty-two million, five hundred forty-four thousand, six hundred fifty-six".