4256156460161 has 2 divisors, whose sum is σ = 4256156460162. Its totient is φ = 4256156460160.

The previous prime is 4256156460137. The next prime is 4256156460203. The reversal of 4256156460161 is 1610646516524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3768315676225 + 487840783936 = 1941215^2 + 698456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4256156460161 is a prime.

It is a super-2 number, since 2×4256156460161² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4256156460761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128078230080 + 2128078230081.

It is an arithmetic number, because the mean of its divisors is an integer number (2128078230081).

Almost surely, 2^{4256156460161} is an apocalyptic number.

It is an amenable number.

4256156460161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4256156460161 is an equidigital number, since it uses as much as digits as its factorization.

4256156460161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 4256156460161 in words is "four trillion, two hundred fifty-six billion, one hundred fifty-six million, four hundred sixty thousand, one hundred sixty-one".