561139695 has 12 divisors (see below), whose sum is σ = 972642216. Its totient is φ = 299274480.

The previous prime is 561139651. The next prime is 561139699. The reversal of 561139695 is 596931165.

It is not a de Polignac number, because 561139695 - 2¹⁶ = 561074159 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 12469771 = 561139695 / (5 + 6 + 1 + 1 + 3 + 9 + 6 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 561139695.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561139699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6234841 + ... + 6234930.

It is an arithmetic number, because the mean of its divisors is an integer number (81053518).

Almost surely, 2^561139695 is an apocalyptic number.

561139695 is a deficient number, since it is larger than the sum of its proper divisors (411502521).

561139695 is a wasteful number, since it uses less digits than its factorization.

561139695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12469782 (or 12469779 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 561139695 is about 23688.3873448574. The cubic root of 561139695 is about 824.8158487051.

The spelling of 561139695 in words is "five hundred sixty-one million, one hundred thirty-nine thousand, six hundred ninety-five".