561238983169 has 4 divisors (see below), whose sum is σ = 590777877040. Its totient is φ = 531700089300.

The previous prime is 561238983139. The next prime is 561238983187. The reversal of 561238983169 is 961389832165.

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 561238983169 - 2¹³ = 561238974977 is a prime.

It is a super-2 number, since 2×561238983169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561238983139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14769446907 + ... + 14769446944.

It is an arithmetic number, because the mean of its divisors is an integer number (147694469260).

Almost surely, 2^561238983169 is an apocalyptic number.

It is an amenable number.

561238983169 is a deficient number, since it is larger than the sum of its proper divisors (29538893871).

561238983169 is a wasteful number, since it uses less digits than its factorization.

561238983169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29538893870.

The product of its digits is 16796160, while the sum is 61.

The spelling of 561238983169 in words is "five hundred sixty-one billion, two hundred thirty-eight million, nine hundred eighty-three thousand, one hundred sixty-nine".