72669784209 has 12 divisors (see below), whose sum is σ = 106502273808. Its totient is φ = 44042293240.

The previous prime is 72669784189. The next prime is 72669784237. The reversal of 72669784209 is 90248796627.

It is not a de Polignac number, because 72669784209 - 2¹⁷ = 72669653137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72669784289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100095759 + ... + 100096484.

It is an arithmetic number, because the mean of its divisors is an integer number (8875189484).

Almost surely, 2^72669784209 is an apocalyptic number.

It is an amenable number.

72669784209 is a deficient number, since it is larger than the sum of its proper divisors (33832489599).

72669784209 is a wasteful number, since it uses less digits than its factorization.

72669784209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200192268 (or 200192257 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 60.

The spelling of 72669784209 in words is "seventy-two billion, six hundred sixty-nine million, seven hundred eighty-four thousand, two hundred nine".