256044324402 has 80 divisors (see below), whose sum is σ = 589004267544. Its totient is φ = 83084832000.

The previous prime is 256044324383. The next prime is 256044324409. The reversal of 256044324402 is 204423440652.

256044324402 is a `hidden beast` number, since 2 + 5 + 604 + 4 + 3 + 2 + 4 + 40 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 215659000881 + 40385323521 = 464391^2 + 200961^2 .

It is a super-2 number, since 2×256044324402² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256044324409) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3020152 + ... + 3103772.

Almost surely, 2^256044324402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256044324402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294502133772).

256044324402 is an abundant number, since it is smaller than the sum of its proper divisors (332959943142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256044324402 is a wasteful number, since it uses less digits than its factorization.

256044324402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84137 (or 84128 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

The spelling of 256044324402 in words is "two hundred fifty-six billion, forty-four million, three hundred twenty-four thousand, four hundred two".