561129679 has 32 divisors (see below), whose sum is σ = 667584000. Its totient is φ = 466093440.

The previous prime is 561129677. The next prime is 561129733. The reversal of 561129679 is 976921165.

It is not a de Polignac number, because 561129679 - 2¹ = 561129677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561129677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1151974 + ... + 1152460.

It is an arithmetic number, because the mean of its divisors is an integer number (20862000).

Almost surely, 2^561129679 is an apocalyptic number.

561129679 is a deficient number, since it is larger than the sum of its proper divisors (106454321).

561129679 is a wasteful number, since it uses less digits than its factorization.

561129679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703.

The product of its digits is 204120, while the sum is 46.

The square root of 561129679 is about 23688.1759323085. The cubic root of 561129679 is about 824.8109411900.

The spelling of 561129679 in words is "five hundred sixty-one million, one hundred twenty-nine thousand, six hundred seventy-nine".