4156256369 has 2 divisors, whose sum is σ = 4156256370. Its totient is φ = 4156256368.

The previous prime is 4156256347. The next prime is 4156256399. The reversal of 4156256369 is 9636526514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3264636769 + 891619600 = 57137^2 + 29860^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156256369 - 2⁸ = 4156256113 is a prime.

It is a super-2 number, since 2×4156256369² = 34548934009706128322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4156256399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2078128184 + 2078128185.

It is an arithmetic number, because the mean of its divisors is an integer number (2078128185).

Almost surely, 2^4156256369 is an apocalyptic number.

It is an amenable number.

4156256369 is a deficient number, since it is larger than the sum of its proper divisors (1).

4156256369 is an equidigital number, since it uses as much as digits as its factorization.

4156256369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 47.

The square root of 4156256369 is about 64469.0341869645. The cubic root of 4156256369 is about 1607.8077191074.

The spelling of 4156256369 in words is "four billion, one hundred fifty-six million, two hundred fifty-six thousand, three hundred sixty-nine".