564541621 has 8 divisors (see below), whose sum is σ = 651579264. Its totient is φ = 479101200.

The previous prime is 564541609. The next prime is 564541633. The reversal of 564541621 is 126145465.

It is an interprime number because it is at equal distance from previous prime (564541609) and next prime (564541633).

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

It is a cyclic number.

It is not a de Polignac number, because 564541621 - 2²⁷ = 430323893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564541421) 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, 398545 + ... + 399958.

It is an arithmetic number, because the mean of its divisors is an integer number (81447408).

Almost surely, 2^564541621 is an apocalyptic number.

It is an amenable number.

564541621 is a deficient number, since it is larger than the sum of its proper divisors (87037643).

564541621 is a wasteful number, since it uses less digits than its factorization.

564541621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798611.

The product of its digits is 28800, while the sum is 34.

The square root of 564541621 is about 23760.0846168527. The cubic root of 564541621 is about 826.4793151094.

The spelling of 564541621 in words is "five hundred sixty-four million, five hundred forty-one thousand, six hundred twenty-one".