428657607823 has 2 divisors, whose sum is σ = 428657607824. Its totient is φ = 428657607822.

The previous prime is 428657607803. The next prime is 428657607863. The reversal of 428657607823 is 328706756824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428657607823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428657607803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214328803911 + 214328803912.

It is an arithmetic number, because the mean of its divisors is an integer number (214328803912).

Almost surely, 2^428657607823 is an apocalyptic number.

428657607823 is a deficient number, since it is larger than the sum of its proper divisors (1).

428657607823 is an equidigital number, since it uses as much as digits as its factorization.

428657607823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 428657607823 in words is "four hundred twenty-eight billion, six hundred fifty-seven million, six hundred seven thousand, eight hundred twenty-three".