254215321664 has 28 divisors (see below), whose sum is σ = 509659144764. Its totient is φ = 125797269504.

The previous prime is 254215321643. The next prime is 254215321669. The reversal of 254215321664 is 466123512452.

It can be written as a sum of positive squares in 2 ways, for example, as 87620736064 + 166594585600 = 296008^2 + 408160^2 .

It is not an unprimeable number, because it can be changed into a prime (254215321669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20468609 + ... + 20481024.

It is an arithmetic number, because the mean of its divisors is an integer number (18202112313).

Almost surely, 2^254215321664 is an apocalyptic number.

It is an amenable number.

254215321664 is an abundant number, since it is smaller than the sum of its proper divisors (255443823100).

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

254215321664 is an equidigital number, since it uses as much as digits as its factorization.

254215321664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40949742 (or 40949732 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The spelling of 254215321664 in words is "two hundred fifty-four billion, two hundred fifteen million, three hundred twenty-one thousand, six hundred sixty-four".