209359814426 has 12 divisors (see below), whose sum is σ = 365311513098. Its totient is φ = 89725634712.

The previous prime is 209359814423. The next prime is 209359814441. The reversal of 209359814426 is 624418953902.

It can be written as a sum of positive squares in only one way, i.e., 209356578025 + 3236401 = 457555^2 + 1799^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209359814423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1068162221 + ... + 1068162416.

Almost surely, 2^209359814426 is an apocalyptic number.

209359814426 is a deficient number, since it is larger than the sum of its proper divisors (155951698672).

209359814426 is a wasteful number, since it uses less digits than its factorization.

209359814426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136324653 (or 2136324646 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 209359814426 in words is "two hundred nine billion, three hundred fifty-nine million, eight hundred fourteen thousand, four hundred twenty-six".