180668733867636 has 24 divisors (see below), whose sum is σ = 481783290313920. Its totient is φ = 51619638247872.

The previous prime is 180668733867593. The next prime is 180668733867647. The reversal of 180668733867636 is 636768337866081.

It is a congruent number.

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, 1075409130081 + ... + 1075409130248.

It is an arithmetic number, because the mean of its divisors is an integer number (20074303763080).

Almost surely, 2^{180668733867636} is an apocalyptic number.

It is an amenable number.

180668733867636 is an abundant number, since it is smaller than the sum of its proper divisors (301114556446284).

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

180668733867636 is a wasteful number, since it uses less digits than its factorization.

180668733867636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150818260343 (or 2150818260341 counting only the distinct ones).

The product of its (nonzero) digits is 5267275776, while the sum is 78.

The spelling of 180668733867636 in words is "one hundred eighty trillion, six hundred sixty-eight billion, seven hundred thirty-three million, eight hundred sixty-seven thousand, six hundred thirty-six".