256514064243 has 32 divisors (see below), whose sum is σ = 348521273856. Its totient is φ = 167784784128.

The previous prime is 256514064229. The next prime is 256514064299. The reversal of 256514064243 is 342460415652.

It is a happy number.

It is not a de Polignac number, because 256514064243 - 2⁸ = 256514063987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256514064195 and 256514064204.

It is not an unprimeable number, because it can be changed into a prime (256514064203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40095921 + ... + 40102317.

It is an arithmetic number, because the mean of its divisors is an integer number (10891289808).

Almost surely, 2^256514064243 is an apocalyptic number.

256514064243 is a deficient number, since it is larger than the sum of its proper divisors (92007209613).

256514064243 is a wasteful number, since it uses less digits than its factorization.

256514064243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403.

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 256514064243 its reverse (342460415652), we get a palindrome (598974479895).

The spelling of 256514064243 in words is "two hundred fifty-six billion, five hundred fourteen million, sixty-four thousand, two hundred forty-three".