564655661050161 has 4 divisors (see below), whose sum is σ = 752874214733552. Its totient is φ = 376437107366772.

The previous prime is 564655661050157. The next prime is 564655661050189. The reversal of 564655661050161 is 161050166556465.

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 not a de Polignac number, because 564655661050161 - 2² = 564655661050157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564655661057161) 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, 94109276841691 + ... + 94109276841696.

It is an arithmetic number, because the mean of its divisors is an integer number (188218553683388).

Almost surely, 2^{564655661050161} is an apocalyptic number.

It is an amenable number.

564655661050161 is a deficient number, since it is larger than the sum of its proper divisors (188218553683391).

564655661050161 is a wasteful number, since it uses less digits than its factorization.

564655661050161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188218553683390.

The product of its (nonzero) digits is 19440000, while the sum is 57.

The spelling of 564655661050161 in words is "five hundred sixty-four trillion, six hundred fifty-five billion, six hundred sixty-one million, fifty thousand, one hundred sixty-one".