256026129536 has 16 divisors (see below), whose sum is σ = 510052055190. Its totient is φ = 128013064704.

The previous prime is 256026129523. The next prime is 256026129547. The reversal of 256026129536 is 635921620652.

It can be written as a sum of positive squares in only one way, i.e., 255267457600 + 758671936 = 505240^2 + 27544^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1000101941 + ... + 1000102196.

Almost surely, 2^256026129536 is an apocalyptic number.

It is an amenable number.

256026129536 is a deficient number, since it is larger than the sum of its proper divisors (254025925654).

256026129536 is an equidigital number, since it uses as much as digits as its factorization.

256026129536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000204151 (or 2000204139 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 256026129536 in words is "two hundred fifty-six billion, twenty-six million, one hundred twenty-nine thousand, five hundred thirty-six".