565016001261 has 4 divisors (see below), whose sum is σ = 753354668352. Its totient is φ = 376677334172.

The previous prime is 565016001259. The next prime is 565016001353. The reversal of 565016001261 is 162100610565.

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 not a de Polignac number, because 565016001261 - 2¹ = 565016001259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565016001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94169333541 + ... + 94169333546.

It is an arithmetic number, because the mean of its divisors is an integer number (188338667088).

Almost surely, 2^565016001261 is an apocalyptic number.

It is an amenable number.

565016001261 is a deficient number, since it is larger than the sum of its proper divisors (188338667091).

565016001261 is a wasteful number, since it uses less digits than its factorization.

565016001261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188338667090.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 565016001261 in words is "five hundred sixty-five billion, sixteen million, one thousand, two hundred sixty-one".