564138646 has 8 divisors (see below), whose sum is σ = 848037024. Its totient is φ = 281459640.

The previous prime is 564138613. The next prime is 564138647. The reversal of 564138646 is 646831465.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564138647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303685 + ... + 305536.

It is an arithmetic number, because the mean of its divisors is an integer number (106004628).

Almost surely, 2^564138646 is an apocalyptic number.

564138646 is a deficient number, since it is larger than the sum of its proper divisors (283898378).

564138646 is a wasteful number, since it uses less digits than its factorization.

564138646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609686.

The product of its digits is 414720, while the sum is 43.

The square root of 564138646 is about 23751.6030195859. The cubic root of 564138646 is about 826.2826187893.

The spelling of 564138646 in words is "five hundred sixty-four million, one hundred thirty-eight thousand, six hundred forty-six".