564809649 has 16 divisors (see below), whose sum is σ = 798657408. Its totient is φ = 353821952.

The previous prime is 564809647. The next prime is 564809723. The reversal of 564809649 is 946908465.

564809649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 564809649 - 2¹ = 564809647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (564809647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24439 + ... + 41555.

It is an arithmetic number, because the mean of its divisors is an integer number (49916088).

Almost surely, 2^564809649 is an apocalyptic number.

It is an amenable number.

564809649 is a deficient number, since it is larger than the sum of its proper divisors (233847759).

564809649 is a wasteful number, since it uses less digits than its factorization.

564809649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17784.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 564809649 is about 23765.7242473273. The cubic root of 564809649 is about 826.6100905574.

The spelling of 564809649 in words is "five hundred sixty-four million, eight hundred nine thousand, six hundred forty-nine".