210881425394 has 8 divisors (see below), whose sum is σ = 316357591260. Its totient is φ = 105428894976.

The previous prime is 210881425357. The next prime is 210881425399. The reversal of 210881425394 is 493524188012.

210881425394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163407552169 + 47473873225 = 404237^2 + 217885^2 .

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

It is not an unprimeable number, because it can be changed into a prime (210881425399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5886539 + ... + 5922254.

Almost surely, 2^210881425394 is an apocalyptic number.

210881425394 is a deficient number, since it is larger than the sum of its proper divisors (105476165866).

210881425394 is a wasteful number, since it uses less digits than its factorization.

210881425394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11817724.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 210881425394 in words is "two hundred ten billion, eight hundred eighty-one million, four hundred twenty-five thousand, three hundred ninety-four".