256352622340 has 48 divisors (see below), whose sum is σ = 570655263024. Its totient is φ = 96399564800.

The previous prime is 256352622277. The next prime is 256352622341. The reversal of 256352622340 is 43226253652.

It can be written as a sum of positive squares in 8 ways, for example, as 19269326596 + 237083295744 = 138814^2 + 486912^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256352622293 and 256352622302.

It is not an unprimeable number, because it can be changed into a prime (256352622341) 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, 128371 + ... + 727450.

It is an arithmetic number, because the mean of its divisors is an integer number (11888651313).

Almost surely, 2^256352622340 is an apocalyptic number.

256352622340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256352622340 is an abundant number, since it is smaller than the sum of its proper divisors (314302640684).

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

256352622340 is a wasteful number, since it uses less digits than its factorization.

256352622340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856728 (or 856726 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 256352622340 its reverse (43226253652), we get a palindrome (299578875992).

The spelling of 256352622340 in words is "two hundred fifty-six billion, three hundred fifty-two million, six hundred twenty-two thousand, three hundred forty".