3256383778457 has 2 divisors, whose sum is σ = 3256383778458. Its totient is φ = 3256383778456.

The previous prime is 3256383778441. The next prime is 3256383778469. The reversal of 3256383778457 is 7548773836523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1898142708361 + 1358241070096 = 1377731^2 + 1165436^2 .

It is a cyclic number.

It is not a de Polignac number, because 3256383778457 - 2⁴ = 3256383778441 is a prime.

It is not a weakly prime, because it can be changed into another prime (3256383778357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628191889228 + 1628191889229.

It is an arithmetic number, because the mean of its divisors is an integer number (1628191889229).

Almost surely, 2^{3256383778457} is an apocalyptic number.

It is an amenable number.

3256383778457 is a deficient number, since it is larger than the sum of its proper divisors (1).

3256383778457 is an equidigital number, since it uses as much as digits as its factorization.

3256383778457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 711244800, while the sum is 68.

The spelling of 3256383778457 in words is "three trillion, two hundred fifty-six billion, three hundred eighty-three million, seven hundred seventy-eight thousand, four hundred fifty-seven".