209419370250368 has 16 divisors (see below), whose sum is σ = 417202651670910. Its totient is φ = 104709685125120.

The previous prime is 209419370250323. The next prime is 209419370250371. The reversal of 209419370250368 is 863052073914902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 186928177820224 + 22491192430144 = 13672168^2 + 4742488^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818044414913 + ... + 818044415168.

It is a 1-persistent number, because it is pandigital, but 2⋅209419370250368 = 418838740500736 is not.

Almost surely, 2^{209419370250368} is an apocalyptic number.

It is an amenable number.

209419370250368 is a deficient number, since it is larger than the sum of its proper divisors (207783281420542).

209419370250368 is an equidigital number, since it uses as much as digits as its factorization.

209419370250368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636088830095 (or 1636088830083 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 209419370250368 in words is "two hundred nine trillion, four hundred nineteen billion, three hundred seventy million, two hundred fifty thousand, three hundred sixty-eight".