256510050471021 has 8 divisors (see below), whose sum is σ = 360014105924320. Its totient is φ = 162006347665872.

The previous prime is 256510050471011. The next prime is 256510050471029. The reversal of 256510050471021 is 120174050015652.

256510050471021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256510050471021 - 2¹⁸ = 256510050208877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256510050471029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250088161970 + ... + 2250088162083.

It is an arithmetic number, because the mean of its divisors is an integer number (45001763240540).

Almost surely, 2^{256510050471021} is an apocalyptic number.

It is an amenable number.

256510050471021 is a deficient number, since it is larger than the sum of its proper divisors (103504055453299).

256510050471021 is a wasteful number, since it uses less digits than its factorization.

256510050471021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500176324075.

The product of its (nonzero) digits is 84000, while the sum is 39.

The spelling of 256510050471021 in words is "two hundred fifty-six trillion, five hundred ten billion, fifty million, four hundred seventy-one thousand, twenty-one".