129647652637 has 2 divisors, whose sum is σ = 129647652638. Its totient is φ = 129647652636.

The previous prime is 129647652577. The next prime is 129647652643. The reversal of 129647652637 is 736256746921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93945928036 + 35701724601 = 306506^2 + 188949^2 .

It is a cyclic number.

It is not a de Polignac number, because 129647652637 - 2¹⁵ = 129647619869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129647652697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64823826318 + 64823826319.

It is an arithmetic number, because the mean of its divisors is an integer number (64823826319).

Almost surely, 2^129647652637 is an apocalyptic number.

It is an amenable number.

129647652637 is a deficient number, since it is larger than the sum of its proper divisors (1).

129647652637 is an equidigital number, since it uses as much as digits as its factorization.

129647652637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 58.

The spelling of 129647652637 in words is "one hundred twenty-nine billion, six hundred forty-seven million, six hundred fifty-two thousand, six hundred thirty-seven".