39344560639 has 2 divisors, whose sum is σ = 39344560640. Its totient is φ = 39344560638.

The previous prime is 39344560637. The next prime is 39344560643. The reversal of 39344560639 is 93606544393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39344560639 - 2¹ = 39344560637 is a prime.

Together with 39344560637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39344560637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19672280319 + 19672280320.

It is an arithmetic number, because the mean of its divisors is an integer number (19672280320).

Almost surely, 2^39344560639 is an apocalyptic number.

39344560639 is a deficient number, since it is larger than the sum of its proper divisors (1).

39344560639 is an equidigital number, since it uses as much as digits as its factorization.

39344560639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 52.

The spelling of 39344560639 in words is "thirty-nine billion, three hundred forty-four million, five hundred sixty thousand, six hundred thirty-nine".