16256317771 has 2 divisors, whose sum is σ = 16256317772. Its totient is φ = 16256317770.

The previous prime is 16256317703. The next prime is 16256317789. The reversal of 16256317771 is 17771365261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16256317771 - 2¹⁹ = 16255793483 is a prime.

It is not a weakly prime, because it can be changed into another prime (16256327771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8128158885 + 8128158886.

It is an arithmetic number, because the mean of its divisors is an integer number (8128158886).

Almost surely, 2^16256317771 is an apocalyptic number.

16256317771 is a deficient number, since it is larger than the sum of its proper divisors (1).

16256317771 is an equidigital number, since it uses as much as digits as its factorization.

16256317771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 46.

The spelling of 16256317771 in words is "sixteen billion, two hundred fifty-six million, three hundred seventeen thousand, seven hundred seventy-one".