129448112657 has 2 divisors, whose sum is σ = 129448112658. Its totient is φ = 129448112656.

The previous prime is 129448112623. The next prime is 129448112663. The reversal of 129448112657 is 756211844921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129276921601 + 171191056 = 359551^2 + 13084^2 .

It is a cyclic number.

It is not a de Polignac number, because 129448112657 - 2¹² = 129448108561 is a prime.

It is not a weakly prime, because it can be changed into another prime (129448112357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64724056328 + 64724056329.

It is an arithmetic number, because the mean of its divisors is an integer number (64724056329).

Almost surely, 2^129448112657 is an apocalyptic number.

It is an amenable number.

129448112657 is a deficient number, since it is larger than the sum of its proper divisors (1).

129448112657 is an equidigital number, since it uses as much as digits as its factorization.

129448112657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The spelling of 129448112657 in words is "one hundred twenty-nine billion, four hundred forty-eight million, one hundred twelve thousand, six hundred fifty-seven".