256140442322 has 18 divisors (see below), whose sum is σ = 388672803279. Its totient is φ = 126599737440.

The previous prime is 256140442321. The next prime is 256140442351. The reversal of 256140442322 is 223244041652.

It can be written as a sum of positive squares in 5 ways, for example, as 1883473201 + 254256969121 = 43399^2 + 504239^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=357869.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256140442321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63698672 + ... + 63702692.

Almost surely, 2^256140442322 is an apocalyptic number.

256140442322 is a deficient number, since it is larger than the sum of its proper divisors (132532360957).

256140442322 is an frugal number, since it uses more digits than its factorization.

256140442322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8222 (or 4112 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 256140442322 its reverse (223244041652), we get a palindrome (479384483974).

The spelling of 256140442322 in words is "two hundred fifty-six billion, one hundred forty million, four hundred forty-two thousand, three hundred twenty-two".