256516021571470 has 16 divisors (see below), whose sum is σ = 471552856676928. Its totient is φ = 100423293551200.

The previous prime is 256516021571441. The next prime is 256516021571477. The reversal of 256516021571470 is 74175120615652.

256516021571470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256516021571477) 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, 272889384181 + ... + 272889385120.

It is an arithmetic number, because the mean of its divisors is an integer number (29472053542308).

Almost surely, 2^{256516021571470} is an apocalyptic number.

256516021571470 is a deficient number, since it is larger than the sum of its proper divisors (215036835105458).

256516021571470 is a wasteful number, since it uses less digits than its factorization.

256516021571470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545778769355.

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 256516021571470 in words is "two hundred fifty-six trillion, five hundred sixteen billion, twenty-one million, five hundred seventy-one thousand, four hundred seventy".