4256431346549 has 2 divisors, whose sum is σ = 4256431346550. Its totient is φ = 4256431346548.

The previous prime is 4256431346539. The next prime is 4256431346669. The reversal of 4256431346549 is 9456431346524.

4256431346549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4094410606225 + 162020740324 = 2023465^2 + 402518^2 .

It is a cyclic number.

It is not a de Polignac number, because 4256431346549 - 2²⁸ = 4256162911093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4256431346494 and 4256431346503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4256431346539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128215673274 + 2128215673275.

It is an arithmetic number, because the mean of its divisors is an integer number (2128215673275).

Almost surely, 2^{4256431346549} is an apocalyptic number.

It is an amenable number.

4256431346549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4256431346549 is an equidigital number, since it uses as much as digits as its factorization.

4256431346549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37324800, while the sum is 56.

The spelling of 4256431346549 in words is "four trillion, two hundred fifty-six billion, four hundred thirty-one million, three hundred forty-six thousand, five hundred forty-nine".