561101165 has 16 divisors (see below), whose sum is σ = 686702016. Its totient is φ = 440044800.

The previous prime is 561101131. The next prime is 561101207.

561101165 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-561101165 is a prime.

It is a Duffinian number.

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, 49205 + ... + 59525.

It is an arithmetic number, because the mean of its divisors is an integer number (42918876).

Almost surely, 2^561101165 is an apocalyptic number.

It is an amenable number.

561101165 is a deficient number, since it is larger than the sum of its proper divisors (125600851).

561101165 is a wasteful number, since it uses less digits than its factorization.

561101165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 561101165 is about 23687.5740632088. The cubic root of 561101165 is about 824.7969699349.

It can be divided in two parts, 56110 and 1165, that added together give a palindrome (57275).

The spelling of 561101165 in words is "five hundred sixty-one million, one hundred one thousand, one hundred sixty-five".