561133331165 has 16 divisors (see below), whose sum is σ = 766512567936. Its totient is φ = 390353620800.

The previous prime is 561133331149. The next prime is 561133331167.

561133331165 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 561133331165 - 2⁴ = 561133331149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561133331167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221790566 + ... + 221793095.

It is an arithmetic number, because the mean of its divisors is an integer number (47907035496).

Almost surely, 2^561133331165 is an apocalyptic number.

561133331165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561133331165 is a deficient number, since it is larger than the sum of its proper divisors (205379236771).

561133331165 is a wasteful number, since it uses less digits than its factorization.

561133331165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443583700.

The product of its digits is 72900, while the sum is 38.

It can be divided in two parts, 561133 and 331165, that added together give a palindrome (892298).

The spelling of 561133331165 in words is "five hundred sixty-one billion, one hundred thirty-three million, three hundred thirty-one thousand, one hundred sixty-five".