256202205340 has 48 divisors (see below), whose sum is σ = 548482485600. Its totient is φ = 100497411072.

The previous prime is 256202205331. The next prime is 256202205359. The reversal of 256202205340 is 43502202652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217192 + ... + 748048.

It is an arithmetic number, because the mean of its divisors is an integer number (11426718450).

Almost surely, 2^256202205340 is an apocalyptic number.

256202205340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256202205340 is an abundant number, since it is smaller than the sum of its proper divisors (292280280260).

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

256202205340 is a wasteful number, since it uses less digits than its factorization.

256202205340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531334 (or 531332 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 256202205340 its reverse (43502202652), we get a palindrome (299704407992).

The spelling of 256202205340 in words is "two hundred fifty-six billion, two hundred two million, two hundred five thousand, three hundred forty".