129678560639 has 2 divisors, whose sum is σ = 129678560640. Its totient is φ = 129678560638.

The previous prime is 129678560633. The next prime is 129678560653. The reversal of 129678560639 is 936065876921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129678560639 - 2¹⁶ = 129678495103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129678560633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64839280319 + 64839280320.

It is an arithmetic number, because the mean of its divisors is an integer number (64839280320).

Almost surely, 2^129678560639 is an apocalyptic number.

129678560639 is a deficient number, since it is larger than the sum of its proper divisors (1).

129678560639 is an equidigital number, since it uses as much as digits as its factorization.

129678560639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 129678560639 in words is "one hundred twenty-nine billion, six hundred seventy-eight million, five hundred sixty thousand, six hundred thirty-nine".