256331680541 has 2 divisors, whose sum is σ = 256331680542. Its totient is φ = 256331680540.

The previous prime is 256331680513. The next prime is 256331680589. The reversal of 256331680541 is 145086133652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197265669316 + 59066011225 = 444146^2 + 243035^2 .

It is a cyclic number.

It is not a de Polignac number, because 256331680541 - 2¹⁴ = 256331664157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256331680492 and 256331680501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256331680141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128165840270 + 128165840271.

It is an arithmetic number, because the mean of its divisors is an integer number (128165840271).

Almost surely, 2^256331680541 is an apocalyptic number.

It is an amenable number.

256331680541 is a deficient number, since it is larger than the sum of its proper divisors (1).

256331680541 is an equidigital number, since it uses as much as digits as its factorization.

256331680541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 256331680541 in words is "two hundred fifty-six billion, three hundred thirty-one million, six hundred eighty thousand, five hundred forty-one".