564515113661 has 4 divisors (see below), whose sum is σ = 564521552352. Its totient is φ = 564508674972.

The previous prime is 564515113609. The next prime is 564515113691. The reversal of 564515113661 is 166311515465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-564515113661 is a prime.

It is a super-3 number, since 3×564515113661³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564515113691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3085991 + ... + 3263796.

It is an arithmetic number, because the mean of its divisors is an integer number (141130388088).

Almost surely, 2^564515113661 is an apocalyptic number.

It is an amenable number.

564515113661 is a deficient number, since it is larger than the sum of its proper divisors (6438691).

564515113661 is an equidigital number, since it uses as much as digits as its factorization.

564515113661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6438690.

The product of its digits is 324000, while the sum is 44.

The spelling of 564515113661 in words is "five hundred sixty-four billion, five hundred fifteen million, one hundred thirteen thousand, six hundred sixty-one".