561711388326631 has 8 divisors (see below), whose sum is σ = 591988384641200. Its totient is φ = 531505715915520.

The previous prime is 561711388326589. The next prime is 561711388326643. The reversal of 561711388326631 is 136623883117165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561711388326631 - 2²¹ = 561711386229479 is a prime.

It is a super-2 number, since 2×561711388326631² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561711388326631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561711388326131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17830959690 + ... + 17830991191.

It is an arithmetic number, because the mean of its divisors is an integer number (73998548080150).

Almost surely, 2^{561711388326631} is an apocalyptic number.

561711388326631 is a deficient number, since it is larger than the sum of its proper divisors (30276996314569).

561711388326631 is a wasteful number, since it uses less digits than its factorization.

561711388326631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35661951729.

The product of its digits is 26127360, while the sum is 61.

The spelling of 561711388326631 in words is "five hundred sixty-one trillion, seven hundred eleven billion, three hundred eighty-eight million, three hundred twenty-six thousand, six hundred thirty-one".