215926868448 has 72 divisors (see below), whose sum is σ = 636784352568. Its totient is φ = 71975620224.

The previous prime is 215926868441. The next prime is 215926868533. The reversal of 215926868448 is 844868629512.

215926868448 is a `hidden beast` number, since 21 + 5 + 92 + 6 + 86 + 8 + 448 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215926868441) 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 11 ways as a sum of consecutive naturals, for example, 13876411 + ... + 13891962.

It is an arithmetic number, because the mean of its divisors is an integer number (8844227119).

Almost surely, 2^215926868448 is an apocalyptic number.

It is an amenable number.

215926868448 is an abundant number, since it is smaller than the sum of its proper divisors (420857484120).

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

215926868448 is an equidigital number, since it uses as much as digits as its factorization.

215926868448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27768398 (or 27768378 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 63.

The spelling of 215926868448 in words is "two hundred fifteen billion, nine hundred twenty-six million, eight hundred sixty-eight thousand, four hundred forty-eight".