256902428143 has 2 divisors, whose sum is σ = 256902428144. Its totient is φ = 256902428142.

The previous prime is 256902428141. The next prime is 256902428149. The reversal of 256902428143 is 341824209652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256902428143 - 2¹ = 256902428141 is a prime.

Together with 256902428141, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 256902428093 and 256902428102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256902428141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128451214071 + 128451214072.

It is an arithmetic number, because the mean of its divisors is an integer number (128451214072).

Almost surely, 2^256902428143 is an apocalyptic number.

256902428143 is a deficient number, since it is larger than the sum of its proper divisors (1).

256902428143 is an equidigital number, since it uses as much as digits as its factorization.

256902428143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 256902428143 in words is "two hundred fifty-six billion, nine hundred two million, four hundred twenty-eight thousand, one hundred forty-three".