2256780369 has 16 divisors (see below), whose sum is σ = 3082907520. Its totient is φ = 1468024320.

The previous prime is 2256780359. The next prime is 2256780389. The reversal of 2256780369 is 9630876522.

It is not a de Polignac number, because 2256780369 - 2⁴ = 2256780353 is a prime.

It is a super-2 number, since 2×2256780369² = 10186115267807552322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2256780349) 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, 33954 + ... + 75275.

It is an arithmetic number, because the mean of its divisors is an integer number (192681720).

Almost surely, 2^2256780369 is an apocalyptic number.

It is an amenable number.

2256780369 is a deficient number, since it is larger than the sum of its proper divisors (826127151).

2256780369 is a wasteful number, since it uses less digits than its factorization.

2256780369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109400.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 2256780369 is about 47505.5825035332. The cubic root of 2256780369 is about 1311.6856433258.

The spelling of 2256780369 in words is "two billion, two hundred fifty-six million, seven hundred eighty thousand, three hundred sixty-nine".