2256521146673 has 2 divisors, whose sum is σ = 2256521146674. Its totient is φ = 2256521146672.

The previous prime is 2256521146657. The next prime is 2256521146741. The reversal of 2256521146673 is 3766411256522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1867136410624 + 389384736049 = 1366432^2 + 624007^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256521146673 - 2⁴ = 2256521146657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2256521146613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128260573336 + 1128260573337.

It is an arithmetic number, because the mean of its divisors is an integer number (1128260573337).

Almost surely, 2^{2256521146673} is an apocalyptic number.

It is an amenable number.

2256521146673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256521146673 is an equidigital number, since it uses as much as digits as its factorization.

2256521146673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 50.

The spelling of 2256521146673 in words is "two trillion, two hundred fifty-six billion, five hundred twenty-one million, one hundred forty-six thousand, six hundred seventy-three".