561101565 has 16 divisors (see below), whose sum is σ = 898128000. Its totient is φ = 299132352.

The previous prime is 561101533. The next prime is 561101587. The reversal of 561101565 is 565101165.

It is not a de Polignac number, because 561101565 - 2⁵ = 561101533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40111 + ... + 52259.

It is an arithmetic number, because the mean of its divisors is an integer number (56133000).

Almost surely, 2^561101565 is an apocalyptic number.

It is an amenable number.

561101565 is a deficient number, since it is larger than the sum of its proper divisors (337026435).

561101565 is a wasteful number, since it uses less digits than its factorization.

561101565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15236.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 561101565 is about 23687.5825064526. The cubic root of 561101565 is about 824.7971659297.

It can be divided in two parts, 56110 and 1565, that added together give a palindrome (57675).

The spelling of 561101565 in words is "five hundred sixty-one million, one hundred one thousand, five hundred sixty-five".