209641513434 has 16 divisors (see below), whose sum is σ = 419304549888. Its totient is φ = 69876917312.

The previous prime is 209641513429. The next prime is 209641513441. The reversal of 209641513434 is 434315146902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768762 + ... + 1005125.

It is an arithmetic number, because the mean of its divisors is an integer number (26206534368).

Almost surely, 2^209641513434 is an apocalyptic number.

209641513434 is an abundant number, since it is smaller than the sum of its proper divisors (209663036454).

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

209641513434 is a wasteful number, since it uses less digits than its factorization.

209641513434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793589.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 209641513434 in words is "two hundred nine billion, six hundred forty-one million, five hundred thirteen thousand, four hundred thirty-four".