564537985 has 16 divisors (see below), whose sum is σ = 746356032. Its totient is φ = 406504000.

The previous prime is 564537973. The next prime is 564537991. The reversal of 564537985 is 589735465.

It is not a de Polignac number, because 564537985 - 2²⁵ = 530983553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45259 + ... + 56368.

It is an arithmetic number, because the mean of its divisors is an integer number (46647252).

Almost surely, 2^564537985 is an apocalyptic number.

564537985 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

564537985 is a deficient number, since it is larger than the sum of its proper divisors (181818047).

564537985 is a wasteful number, since it uses less digits than its factorization.

564537985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101744.

The product of its digits is 4536000, while the sum is 52.

The square root of 564537985 is about 23760.0081018505. The cubic root of 564537985 is about 826.4775407583.

The spelling of 564537985 in words is "five hundred sixty-four million, five hundred thirty-seven thousand, nine hundred eighty-five".