209713906164 has 36 divisors (see below), whose sum is σ = 569223461184. Its totient is φ = 59918258736.

The previous prime is 209713906163. The next prime is 209713906187. The reversal of 209713906164 is 461609317902.

209713906164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209713906163) 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 11 ways as a sum of consecutive naturals, for example, 178327564 + ... + 178328739.

Almost surely, 2^209713906164 is an apocalyptic number.

It is an amenable number.

209713906164 is an abundant number, since it is smaller than the sum of its proper divisors (359509555020).

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

209713906164 is a wasteful number, since it uses less digits than its factorization.

209713906164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356656324 (or 356656315 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 209713906164 in words is "two hundred nine billion, seven hundred thirteen million, nine hundred six thousand, one hundred sixty-four".