209140990468 has 48 divisors (see below), whose sum is σ = 400970470320. Its totient is φ = 95006191616.

The previous prime is 209140990403. The next prime is 209140990481. The reversal of 209140990468 is 864099041902.

209140990468 is digitally balanced in base 3, 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 8 ways, for example, as 8157341124 + 200983649344 = 90318^2 + 448312^2 .

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 15 ways as a sum of consecutive naturals, for example, 14934846 + ... + 14948842.

It is an arithmetic number, because the mean of its divisors is an integer number (8353551465).

Almost surely, 2^209140990468 is an apocalyptic number.

It is an amenable number.

209140990468 is a deficient number, since it is larger than the sum of its proper divisors (191829479852).

209140990468 is a wasteful number, since it uses less digits than its factorization.

209140990468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21624 (or 21622 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 209140990468 in words is "two hundred nine billion, one hundred forty million, nine hundred ninety thousand, four hundred sixty-eight".