3256643477 has 2 divisors, whose sum is σ = 3256643478. Its totient is φ = 3256643476.

The previous prime is 3256643323. The next prime is 3256643503. The reversal of 3256643477 is 7743466523.

3256643477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3056873521 + 199769956 = 55289^2 + 14134^2 .

It is a cyclic number.

It is not a de Polignac number, because 3256643477 - 2²⁸ = 2988208021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3256640477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628321738 + 1628321739.

It is an arithmetic number, because the mean of its divisors is an integer number (1628321739).

Almost surely, 2^3256643477 is an apocalyptic number.

It is an amenable number.

3256643477 is a deficient number, since it is larger than the sum of its proper divisors (1).

3256643477 is an equidigital number, since it uses as much as digits as its factorization.

3256643477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 47.

The square root of 3256643477 is about 57067.0086564908. The cubic root of 3256643477 is about 1482.2566433950.

The spelling of 3256643477 in words is "three billion, two hundred fifty-six million, six hundred forty-three thousand, four hundred seventy-seven".