256733406767020 has 12 divisors (see below), whose sum is σ = 539140154210784. Its totient is φ = 102693362706800.

The previous prime is 256733406767011. The next prime is 256733406767051. The reversal of 256733406767020 is 20767604337652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6418335169156 + ... + 6418335169195.

It is an arithmetic number, because the mean of its divisors is an integer number (44928346184232).

Almost surely, 2^{256733406767020} is an apocalyptic number.

256733406767020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256733406767020 is an abundant number, since it is smaller than the sum of its proper divisors (282406747443764).

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

256733406767020 is a wasteful number, since it uses less digits than its factorization.

256733406767020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12836670338360 (or 12836670338358 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 58.

The spelling of 256733406767020 in words is "two hundred fifty-six trillion, seven hundred thirty-three billion, four hundred six million, seven hundred sixty-seven thousand, twenty".