561681695 has 16 divisors (see below), whose sum is σ = 693725472. Its totient is φ = 436329600.

The previous prime is 561681671. The next prime is 561681713. The reversal of 561681695 is 596186165.

It is not a de Polignac number, because 561681695 - 2¹⁴ = 561665311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29645 + ... + 44745.

It is an arithmetic number, because the mean of its divisors is an integer number (43357842).

Almost surely, 2^561681695 is an apocalyptic number.

561681695 is a deficient number, since it is larger than the sum of its proper divisors (132043777).

561681695 is a wasteful number, since it uses less digits than its factorization.

561681695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15322.

The product of its digits is 388800, while the sum is 47.

The square root of 561681695 is about 23699.8247883819. The cubic root of 561681695 is about 825.0813240922.

The spelling of 561681695 in words is "five hundred sixty-one million, six hundred eighty-one thousand, six hundred ninety-five".