561115565065 has 32 divisors (see below), whose sum is σ = 777839065344. Its totient is φ = 384040151040.

The previous prime is 561115565051. The next prime is 561115565093. The reversal of 561115565065 is 560565511165.

It is a happy number.

It is not a de Polignac number, because 561115565065 - 2¹⁹ = 561115040777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11548252 + ... + 11596738.

It is an arithmetic number, because the mean of its divisors is an integer number (24307470792).

Almost surely, 2^561115565065 is an apocalyptic number.

561115565065 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561115565065 is a deficient number, since it is larger than the sum of its proper divisors (216723500279).

561115565065 is a wasteful number, since it uses less digits than its factorization.

561115565065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60897.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 561115565065 in words is "five hundred sixty-one billion, one hundred fifteen million, five hundred sixty-five thousand, sixty-five".