561876322639 has 2 divisors, whose sum is σ = 561876322640. Its totient is φ = 561876322638.

The previous prime is 561876322577. The next prime is 561876322643. The reversal of 561876322639 is 936223678165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561876322639 - 2¹¹ = 561876320591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561876320639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280938161319 + 280938161320.

It is an arithmetic number, because the mean of its divisors is an integer number (280938161320).

Almost surely, 2^561876322639 is an apocalyptic number.

561876322639 is a deficient number, since it is larger than the sum of its proper divisors (1).

561876322639 is an equidigital number, since it uses as much as digits as its factorization.

561876322639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 58.

The spelling of 561876322639 in words is "five hundred sixty-one billion, eight hundred seventy-six million, three hundred twenty-two thousand, six hundred thirty-nine".