564643898 has 16 divisors (see below), whose sum is σ = 1042419840. Its totient is φ = 223375536.

The previous prime is 564643897. The next prime is 564643903. The reversal of 564643898 is 898346465.

It is not an unprimeable number, because it can be changed into a prime (564643897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551038 + ... + 1551401.

It is an arithmetic number, because the mean of its divisors is an integer number (65151240).

Almost surely, 2^564643898 is an apocalyptic number.

564643898 is a deficient number, since it is larger than the sum of its proper divisors (477775942).

564643898 is a wasteful number, since it uses less digits than its factorization.

564643898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102461.

The product of its digits is 4976640, while the sum is 53.

The square root of 564643898 is about 23762.2368054861. The cubic root of 564643898 is about 826.5292226908.

The spelling of 564643898 in words is "five hundred sixty-four million, six hundred forty-three thousand, eight hundred ninety-eight".