2256163729 has 2 divisors, whose sum is σ = 2256163730. Its totient is φ = 2256163728.

The previous prime is 2256163711. The next prime is 2256163739. The reversal of 2256163729 is 9273616522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2249130625 + 7033104 = 47425^2 + 2652^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256163729 - 2²³ = 2247775121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2256163739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128081864 + 1128081865.

It is an arithmetic number, because the mean of its divisors is an integer number (1128081865).

Almost surely, 2^2256163729 is an apocalyptic number.

It is an amenable number.

2256163729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256163729 is an equidigital number, since it uses as much as digits as its factorization.

2256163729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The square root of 2256163729 is about 47499.0918755296. The cubic root of 2256163729 is about 1311.5661646316.

The spelling of 2256163729 in words is "two billion, two hundred fifty-six million, one hundred sixty-three thousand, seven hundred twenty-nine".