561601066639 has 2 divisors, whose sum is σ = 561601066640. Its totient is φ = 561601066638.

The previous prime is 561601066597. The next prime is 561601066703. The reversal of 561601066639 is 936660106165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561601066639 - 2²⁷ = 561466848911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561601066592 and 561601066601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561601067639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280800533319 + 280800533320.

It is an arithmetic number, because the mean of its divisors is an integer number (280800533320).

Almost surely, 2^561601066639 is an apocalyptic number.

561601066639 is a deficient number, since it is larger than the sum of its proper divisors (1).

561601066639 is an equidigital number, since it uses as much as digits as its factorization.

561601066639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 561601066639 in words is "five hundred sixty-one billion, six hundred one million, sixty-six thousand, six hundred thirty-nine".