256814701433 has 2 divisors, whose sum is σ = 256814701434. Its totient is φ = 256814701432.

The previous prime is 256814701373. The next prime is 256814701477. The reversal of 256814701433 is 334107418652.

It is a happy number.

It is an a-pointer prime, because the next prime (256814701477) can be obtained adding 256814701433 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254048257024 + 2766444409 = 504032^2 + 52597^2 .

It is a cyclic number.

It is not a de Polignac number, because 256814701433 - 2⁸ = 256814701177 is a prime.

It is a super-3 number, since 3×256814701433³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (256814706433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128407350716 + 128407350717.

It is an arithmetic number, because the mean of its divisors is an integer number (128407350717).

Almost surely, 2^256814701433 is an apocalyptic number.

It is an amenable number.

256814701433 is a deficient number, since it is larger than the sum of its proper divisors (1).

256814701433 is an equidigital number, since it uses as much as digits as its factorization.

256814701433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 256814701433 in words is "two hundred fifty-six billion, eight hundred fourteen million, seven hundred one thousand, four hundred thirty-three".