56684005639 has 2 divisors, whose sum is σ = 56684005640. Its totient is φ = 56684005638.

The previous prime is 56684005621. The next prime is 56684005691. The reversal of 56684005639 is 93650048665.

It is an a-pointer prime, because the next prime (56684005691) can be obtained adding 56684005639 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56684005639 - 2⁹ = 56684005127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56684005619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28342002819 + 28342002820.

It is an arithmetic number, because the mean of its divisors is an integer number (28342002820).

Almost surely, 2^56684005639 is an apocalyptic number.

56684005639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56684005639 is an equidigital number, since it uses as much as digits as its factorization.

56684005639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 56684005639 in words is "fifty-six billion, six hundred eighty-four million, five thousand, six hundred thirty-nine".