256534430722 has 8 divisors (see below), whose sum is σ = 384809760972. Its totient is φ = 128264510400.

The previous prime is 256534430689. The next prime is 256534430729. The reversal of 256534430722 is 227034435652.

It can be written as a sum of positive squares in 2 ways, for example, as 248014956121 + 8519474601 = 498011^2 + 92301^2 .

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

It is not an unprimeable number, because it can be changed into a prime (256534430729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231779 + ... + 1424902.

Almost surely, 2^256534430722 is an apocalyptic number.

256534430722 is a deficient number, since it is larger than the sum of its proper divisors (128275330250).

256534430722 is a wasteful number, since it uses less digits than its factorization.

256534430722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704964.

The product of its (nonzero) digits is 1209600, while the sum is 43.

The spelling of 256534430722 in words is "two hundred fifty-six billion, five hundred thirty-four million, four hundred thirty thousand, seven hundred twenty-two".