564404665 has 16 divisors (see below), whose sum is σ = 746179776. Its totient is φ = 406408000.

The previous prime is 564404663. The next prime is 564404669. The reversal of 564404665 is 566404465.

It is not a de Polignac number, because 564404665 - 2¹ = 564404663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564404663) 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, 45247 + ... + 56356.

It is an arithmetic number, because the mean of its divisors is an integer number (46636236).

Almost surely, 2^564404665 is an apocalyptic number.

564404665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

564404665 is a deficient number, since it is larger than the sum of its proper divisors (181775111).

564404665 is a wasteful number, since it uses less digits than its factorization.

564404665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101720.

The product of its (nonzero) digits is 345600, while the sum is 40.

The square root of 564404665 is about 23757.2023815937. The cubic root of 564404665 is about 826.4124759539.

The spelling of 564404665 in words is "five hundred sixty-four million, four hundred four thousand, six hundred sixty-five".