210918975040 has 28 divisors (see below), whose sum is σ = 502250810076. Its totient is φ = 84367589888.

The previous prime is 210918974951. The next prime is 210918975077. The reversal of 210918975040 is 40579819012.

It can be written as a sum of positive squares in 2 ways, for example, as 131385950784 + 79533024256 = 362472^2 + 282016^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329560579 + ... + 329561218.

Almost surely, 2^210918975040 is an apocalyptic number.

210918975040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210918975040 is an abundant number, since it is smaller than the sum of its proper divisors (291331835036).

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

210918975040 is an equidigital number, since it uses as much as digits as its factorization.

210918975040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659121814 (or 659121804 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 210918975040 in words is "two hundred ten billion, nine hundred eighteen million, nine hundred seventy-five thousand, forty".