561786687165 has 32 divisors (see below), whose sum is σ = 981044929152. Its totient is φ = 272250368000.

The previous prime is 561786687157. The next prime is 561786687173.

561786687165 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (561786687157) and next prime (561786687173).

It is not a de Polignac number, because 561786687165 - 2³ = 561786687157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561786687096 and 561786687105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474696 + ... + 1161425.

It is an arithmetic number, because the mean of its divisors is an integer number (30657654036).

Almost surely, 2^561786687165 is an apocalyptic number.

561786687165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561786687165 is a deficient number, since it is larger than the sum of its proper divisors (419258241987).

561786687165 is a wasteful number, since it uses less digits than its factorization.

561786687165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638221.

The product of its digits is 101606400, while the sum is 66.

The spelling of 561786687165 in words is "five hundred sixty-one billion, seven hundred eighty-six million, six hundred eighty-seven thousand, one hundred sixty-five".