180921162028 has 6 divisors (see below), whose sum is σ = 316612033556. Its totient is φ = 90460581012.

The previous prime is 180921161983. The next prime is 180921162031. The reversal of 180921162028 is 820261129081.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22615145250 + ... + 22615145257.

Almost surely, 2^180921162028 is an apocalyptic number.

It is an amenable number.

180921162028 is a deficient number, since it is larger than the sum of its proper divisors (135690871528).

180921162028 is a wasteful number, since it uses less digits than its factorization.

180921162028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45230290511 (or 45230290509 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 180921162028 in words is "one hundred eighty billion, nine hundred twenty-one million, one hundred sixty-two thousand, twenty-eight".