256465641430 has 16 divisors (see below), whose sum is σ = 461714832720. Its totient is φ = 102569216992.

The previous prime is 256465641361. The next prime is 256465641431. The reversal of 256465641430 is 34146564652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256465641431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066644 + ... + 2187223.

It is an arithmetic number, because the mean of its divisors is an integer number (28857177045).

Almost surely, 2^256465641430 is an apocalyptic number.

256465641430 is a deficient number, since it is larger than the sum of its proper divisors (205249191290).

256465641430 is a wasteful number, since it uses less digits than its factorization.

256465641430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259903.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 256465641430 in words is "two hundred fifty-six billion, four hundred sixty-five million, six hundred forty-one thousand, four hundred thirty".