256503200160020 has 48 divisors (see below), whose sum is σ = 590260605193728. Its totient is φ = 92855622380160.

The previous prime is 256503200159971. The next prime is 256503200160043. The reversal of 256503200160020 is 20061002305652.

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, 2614129499 + ... + 2614227618.

It is an arithmetic number, because the mean of its divisors is an integer number (12297095941536).

Almost surely, 2^{256503200160020} is an apocalyptic number.

256503200160020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256503200160020 is an abundant number, since it is smaller than the sum of its proper divisors (333757405033708).

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

256503200160020 is a wasteful number, since it uses less digits than its factorization.

256503200160020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228357360 (or 5228357358 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 256503200160020 its reverse (20061002305652), we get a palindrome (276564202465672).

The spelling of 256503200160020 in words is "two hundred fifty-six trillion, five hundred three billion, two hundred million, one hundred sixty thousand, twenty".