129585746639 has 2 divisors, whose sum is σ = 129585746640. Its totient is φ = 129585746638.

The previous prime is 129585746617. The next prime is 129585746659. The reversal of 129585746639 is 936647585921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129585746639 - 2²⁰ = 129584698063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129585746659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64792873319 + 64792873320.

It is an arithmetic number, because the mean of its divisors is an integer number (64792873320).

Almost surely, 2^129585746639 is an apocalyptic number.

129585746639 is a deficient number, since it is larger than the sum of its proper divisors (1).

129585746639 is an equidigital number, since it uses as much as digits as its factorization.

129585746639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97977600, while the sum is 65.

The spelling of 129585746639 in words is "one hundred twenty-nine billion, five hundred eighty-five million, seven hundred forty-six thousand, six hundred thirty-nine".