256535454312 has 96 divisors (see below), whose sum is σ = 703653132000. Its totient is φ = 84426986880.

The previous prime is 256535454283. The next prime is 256535454319. The reversal of 256535454312 is 213454535652.

256535454312 is a `hidden beast` number, since 2 + 5 + 6 + 53 + 54 + 543 + 1 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (256535454319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1740639 + ... + 1882257.

It is an arithmetic number, because the mean of its divisors is an integer number (7329720125).

Almost surely, 2^256535454312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256535454312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351826566000).

256535454312 is an abundant number, since it is smaller than the sum of its proper divisors (447117677688).

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

256535454312 is a wasteful number, since it uses less digits than its factorization.

256535454312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141951 (or 141944 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 45.

Adding to 256535454312 its reverse (213454535652), we get a palindrome (469989989964).

The spelling of 256535454312 in words is "two hundred fifty-six billion, five hundred thirty-five million, four hundred fifty-four thousand, three hundred twelve".