209106764380 has 12 divisors (see below), whose sum is σ = 439124205240. Its totient is φ = 83642705744.

The previous prime is 209106764357. The next prime is 209106764431. The reversal of 209106764380 is 83467601902.

It is a self number, because there is not a number n which added to its sum of digits gives 209106764380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5227669090 + ... + 5227669129.

It is an arithmetic number, because the mean of its divisors is an integer number (36593683770).

Almost surely, 2^209106764380 is an apocalyptic number.

209106764380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209106764380 is an abundant number, since it is smaller than the sum of its proper divisors (230017440860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209106764380 is a wasteful number, since it uses less digits than its factorization.

209106764380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10455338228 (or 10455338226 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 209106764380 in words is "two hundred nine billion, one hundred six million, seven hundred sixty-four thousand, three hundred eighty".