3256564809 has 16 divisors (see below), whose sum is σ = 4366237824. Its totient is φ = 2158992000.

The previous prime is 3256564783. The next prime is 3256564813. The reversal of 3256564809 is 9084656523.

It is not a de Polignac number, because 3256564809 - 2¹³ = 3256556617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3256564819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655284 + ... + 660234.

It is an arithmetic number, because the mean of its divisors is an integer number (272889864).

Almost surely, 2^3256564809 is an apocalyptic number.

It is an amenable number.

3256564809 is a deficient number, since it is larger than the sum of its proper divisors (1109673015).

3256564809 is a wasteful number, since it uses less digits than its factorization.

3256564809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The square root of 3256564809 is about 57066.3193924402. The cubic root of 3256564809 is about 1482.2447080895.

The spelling of 3256564809 in words is "three billion, two hundred fifty-six million, five hundred sixty-four thousand, eight hundred nine".