180846918121 has 9 divisors (see below), whose sum is σ = 181756837821. Its totient is φ = 179941537452.

The previous prime is 180846918113. The next prime is 180846918149. The reversal of 180846918121 is 121819648081.

The square root of 180846918121 is 425261.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 180846918121 - 2³ = 180846918113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180846918101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94832250 + ... + 94834156.

Almost surely, 2^180846918121 is an apocalyptic number.

180846918121 is the 425261-st square number.

180846918121 is the 212631-st centered octagonal number.

It is an amenable number.

180846918121 is a deficient number, since it is larger than the sum of its proper divisors (909919700).

180846918121 is an frugal number, since it uses more digits than its factorization.

180846918121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 49.

Multiplying 180846918121 by its sum of digits (49), we get a square (8861498987929 = 2976827²).

The spelling of 180846918121 in words is "one hundred eighty billion, eight hundred forty-six million, nine hundred eighteen thousand, one hundred twenty-one".