549966138636 has 24 divisors (see below), whose sum is σ = 1350794025280. Its totient is φ = 173673517392.

The previous prime is 549966138599. The next prime is 549966138647. The reversal of 549966138636 is 636831669945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206065866 + ... + 1206066321.

Almost surely, 2^549966138636 is an apocalyptic number.

It is an amenable number.

549966138636 is an abundant number, since it is smaller than the sum of its proper divisors (800827886644).

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

549966138636 is a wasteful number, since it uses less digits than its factorization.

549966138636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412132213 (or 2412132211 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 66.

The spelling of 549966138636 in words is "five hundred forty-nine billion, nine hundred sixty-six million, one hundred thirty-eight thousand, six hundred thirty-six".