120243990636 has 72 divisors (see below), whose sum is σ = 378950767104. Its totient is φ = 31232204640.

The previous prime is 120243990563. The next prime is 120243990667. The reversal of 120243990636 is 636099342021.

120243990636 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 4 + 3 + 9 + 9 + 0 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 120243990591 and 120243990600.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21686260 + ... + 21691803.

Almost surely, 2^120243990636 is an apocalyptic number.

It is an amenable number.

120243990636 is an abundant number, since it is smaller than the sum of its proper divisors (258706776468).

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

120243990636 is a wasteful number, since it uses less digits than its factorization.

120243990636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43378091 (or 43378086 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 120243990636 in words is "one hundred twenty billion, two hundred forty-three million, nine hundred ninety thousand, six hundred thirty-six".