256042263252 has 24 divisors (see below), whose sum is σ = 598629220000. Its totient is φ = 85176382176.

The previous prime is 256042263233. The next prime is 256042263283. The reversal of 256042263252 is 252362240652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256042263252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21373627 + ... + 21385602.

Almost surely, 2^256042263252 is an apocalyptic number.

It is an amenable number.

256042263252 is an abundant number, since it is smaller than the sum of its proper divisors (342586956748).

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

256042263252 is a wasteful number, since it uses less digits than its factorization.

256042263252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42759735 (or 42759733 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 256042263252 in words is "two hundred fifty-six billion, forty-two million, two hundred sixty-three thousand, two hundred fifty-two".