209073215449 has 16 divisors (see below), whose sum is σ = 242760728448. Its totient is φ = 176357486592.

The previous prime is 209073215447. The next prime is 209073215459. The reversal of 209073215449 is 944512370902.

It is not a de Polignac number, because 209073215449 - 2¹ = 209073215447 is a prime.

It is a super-4 number, since 4×209073215449⁴ (a number of 46 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209073215399 and 209073215408.

It is not an unprimeable number, because it can be changed into a prime (209073215447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550782 + ... + 849415.

It is an arithmetic number, because the mean of its divisors is an integer number (15172545528).

Almost surely, 2^209073215449 is an apocalyptic number.

It is an amenable number.

209073215449 is a deficient number, since it is larger than the sum of its proper divisors (33687512999).

209073215449 is a wasteful number, since it uses less digits than its factorization.

209073215449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400544.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 209073215449 in words is "two hundred nine billion, seventy-three million, two hundred fifteen thousand, four hundred forty-nine".