256651253343 has 6 divisors (see below), whose sum is σ = 370718477064. Its totient is φ = 171100835556.

The previous prime is 256651253303. The next prime is 256651253399. The reversal of 256651253343 is 343352156652.

256651253343 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 51 + 253 + 343 = 666.

It is not a de Polignac number, because 256651253343 - 2⁶ = 256651253279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256651253303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14258402955 + ... + 14258402972.

It is an arithmetic number, because the mean of its divisors is an integer number (61786412844).

Almost surely, 2^256651253343 is an apocalyptic number.

256651253343 is a deficient number, since it is larger than the sum of its proper divisors (114067223721).

256651253343 is a wasteful number, since it uses less digits than its factorization.

256651253343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28516805933 (or 28516805930 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 45.

The spelling of 256651253343 in words is "two hundred fifty-six billion, six hundred fifty-one million, two hundred fifty-three thousand, three hundred forty-three".