256406862998 has 32 divisors (see below), whose sum is σ = 452604499200. Its totient is φ = 107403622560.

The previous prime is 256406862991. The next prime is 256406863039. The reversal of 256406862998 is 899268604652.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256406862991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577040 + ... + 919667.

It is an arithmetic number, because the mean of its divisors is an integer number (14143890600).

Almost surely, 2^256406862998 is an apocalyptic number.

256406862998 is a deficient number, since it is larger than the sum of its proper divisors (196197636202).

256406862998 is a wasteful number, since it uses less digits than its factorization.

256406862998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497332.

The product of its (nonzero) digits is 89579520, while the sum is 65.

The spelling of 256406862998 in words is "two hundred fifty-six billion, four hundred six million, eight hundred sixty-two thousand, nine hundred ninety-eight".