428656246129 has 2 divisors, whose sum is σ = 428656246130. Its totient is φ = 428656246128.

The previous prime is 428656246127. The next prime is 428656246141. The reversal of 428656246129 is 921642656824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384583541904 + 44072704225 = 620148^2 + 209935^2 .

It is a cyclic number.

It is not a de Polignac number, because 428656246129 - 2¹ = 428656246127 is a prime.

Together with 428656246127, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 428656246129.

It is not a weakly prime, because it can be changed into another prime (428656246127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214328123064 + 214328123065.

It is an arithmetic number, because the mean of its divisors is an integer number (214328123065).

Almost surely, 2^428656246129 is an apocalyptic number.

It is an amenable number.

428656246129 is a deficient number, since it is larger than the sum of its proper divisors (1).

428656246129 is an equidigital number, since it uses as much as digits as its factorization.

428656246129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 55.

The spelling of 428656246129 in words is "four hundred twenty-eight billion, six hundred fifty-six million, two hundred forty-six thousand, one hundred twenty-nine".