129825287677 has 2 divisors, whose sum is σ = 129825287678. Its totient is φ = 129825287676.

The previous prime is 129825287651. The next prime is 129825287729. The reversal of 129825287677 is 776782528921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97480703961 + 32344583716 = 312219^2 + 179846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129825287677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129825287617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64912643838 + 64912643839.

It is an arithmetic number, because the mean of its divisors is an integer number (64912643839).

Almost surely, 2^129825287677 is an apocalyptic number.

It is an amenable number.

129825287677 is a deficient number, since it is larger than the sum of its proper divisors (1).

129825287677 is an equidigital number, since it uses as much as digits as its factorization.

129825287677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47416320, while the sum is 64.

The spelling of 129825287677 in words is "one hundred twenty-nine billion, eight hundred twenty-five million, two hundred eighty-seven thousand, six hundred seventy-seven".