564662421 has 20 divisors (see below), whose sum is σ = 857343564. Its totient is φ = 370267200.

The previous prime is 564662407. The next prime is 564662431. The reversal of 564662421 is 124266465.

564662421 is a `hidden beast` number, since 5 + 6 + 4 + 6 + 624 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 153140625 + 411521796 = 12375^2 + 20286^2 .

It is not a de Polignac number, because 564662421 - 2⁵ = 564662389 is a prime.

It is a super-3 number, since 3×564662421³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564662431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 52200 + ... + 62081.

Almost surely, 2^564662421 is an apocalyptic number.

It is an amenable number.

564662421 is a deficient number, since it is larger than the sum of its proper divisors (292681143).

564662421 is a wasteful number, since it uses less digits than its factorization.

564662421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114354 (or 114345 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 564662421 is about 23762.6265593684. The cubic root of 564662421 is about 826.5382606192.

The spelling of 564662421 in words is "five hundred sixty-four million, six hundred sixty-two thousand, four hundred twenty-one".