120783634209 has 24 divisors (see below), whose sum is σ = 199493611200. Its totient is φ = 68982958368.

The previous prime is 120783634207. The next prime is 120783634249. The reversal of 120783634209 is 902436387021.

120783634209 is a `hidden beast` number, since 1 + 2 + 0 + 7 + 8 + 3 + 634 + 2 + 0 + 9 = 666.

It is not a de Polignac number, because 120783634209 - 2¹ = 120783634207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120783634207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382534 + ... + 622815.

It is an arithmetic number, because the mean of its divisors is an integer number (8312233800).

Almost surely, 2^120783634209 is an apocalyptic number.

It is an amenable number.

120783634209 is a deficient number, since it is larger than the sum of its proper divisors (78709976991).

120783634209 is a wasteful number, since it uses less digits than its factorization.

120783634209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007269 (or 1007266 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 120783634209 in words is "one hundred twenty billion, seven hundred eighty-three million, six hundred thirty-four thousand, two hundred nine".