209106764379 has 16 divisors (see below), whose sum is σ = 309828912640. Its totient is φ = 139386008520.

The previous prime is 209106764357. The next prime is 209106764431. The reversal of 209106764379 is 973467601902.

It is a happy number.

209106764379 is a `hidden beast` number, since 209 + 1 + 0 + 6 + 7 + 64 + 379 = 666.

209106764379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209106764379 - 2¹⁵ = 209106731611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209106764579) 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 15 ways as a sum of consecutive naturals, for example, 305167 + ... + 715080.

It is an arithmetic number, because the mean of its divisors is an integer number (19364307040).

Almost surely, 2^209106764379 is an apocalyptic number.

209106764379 is a deficient number, since it is larger than the sum of its proper divisors (100722148261).

209106764379 is a wasteful number, since it uses less digits than its factorization.

209106764379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027847 (or 1027841 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 209106764379 in words is "two hundred nine billion, one hundred six million, seven hundred sixty-four thousand, three hundred seventy-nine".