256273643460 has 192 divisors, whose sum is σ = 734929977600. Its totient is φ = 66710274048.

The previous prime is 256273643453. The next prime is 256273643473. The reversal of 256273643460 is 64346372652.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 222266244 + ... + 222267396.

It is an arithmetic number, because the mean of its divisors is an integer number (3827760300).

Almost surely, 2^256273643460 is an apocalyptic number.

256273643460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256273643460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367464988800).

256273643460 is an abundant number, since it is smaller than the sum of its proper divisors (478656334140).

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

256273643460 is a wasteful number, since it uses less digits than its factorization.

256273643460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 48.

The spelling of 256273643460 in words is "two hundred fifty-six billion, two hundred seventy-three million, six hundred forty-three thousand, four hundred sixty".