2256643266434 has 8 divisors (see below), whose sum is σ = 3431334282060. Its totient is φ = 1112865172416.

The previous prime is 2256643266431. The next prime is 2256643266491. The reversal of 2256643266434 is 4346623466522.

It can be written as a sum of positive squares in 2 ways, for example, as 2231662515625 + 24980750809 = 1493875^2 + 158053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2256643266434² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2256643266431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7728230219 + ... + 7728230510.

Almost surely, 2^{2256643266434} is an apocalyptic number.

2256643266434 is a deficient number, since it is larger than the sum of its proper divisors (1174691015626).

2256643266434 is a wasteful number, since it uses less digits than its factorization.

2256643266434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15456460804.

The product of its digits is 29859840, while the sum is 53.

The spelling of 2256643266434 in words is "two trillion, two hundred fifty-six billion, six hundred forty-three million, two hundred sixty-six thousand, four hundred thirty-four".