561292165 has 16 divisors (see below), whose sum is σ = 781264512. Its totient is φ = 379139904.

The previous prime is 561292153. The next prime is 561292241.

561292165 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 561292165 - 2¹⁵ = 561259397 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117334 + ... + 122023.

It is an arithmetic number, because the mean of its divisors is an integer number (48829032).

Almost surely, 2^561292165 is an apocalyptic number.

It is an amenable number.

561292165 is a deficient number, since it is larger than the sum of its proper divisors (219972347).

561292165 is a wasteful number, since it uses less digits than its factorization.

561292165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239436.

The product of its digits is 32400, while the sum is 37.

The square root of 561292165 is about 23691.6053698351. The cubic root of 561292165 is about 824.8905468507.

It can be divided in two parts, 561 and 292165, that multiplied together give a triangular number (163904565 = T₁₈₁₀₅).

The spelling of 561292165 in words is "five hundred sixty-one million, two hundred ninety-two thousand, one hundred sixty-five".