209946768442 has 16 divisors (see below), whose sum is σ = 331996442400. Its totient is φ = 99298005840.

The previous prime is 209946768433. The next prime is 209946768443. The reversal of 209946768442 is 244867649902.

209946768442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (209946768443) 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 7 ways as a sum of consecutive naturals, for example, 4154092 + ... + 4204327.

It is an arithmetic number, because the mean of its divisors is an integer number (20749777650).

Almost surely, 2^209946768442 is an apocalyptic number.

209946768442 is a deficient number, since it is larger than the sum of its proper divisors (122049673958).

209946768442 is a wasteful number, since it uses less digits than its factorization.

209946768442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8359101.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 209946768442 in words is "two hundred nine billion, nine hundred forty-six million, seven hundred sixty-eight thousand, four hundred forty-two".