181487928196 has 27 divisors (see below), whose sum is σ = 323790031621. Its totient is φ = 89009661104.

The previous prime is 181487928191. The next prime is 181487928221. The reversal of 181487928196 is 691829784181.

The square root of 181487928196 is 426014.

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

It can be written as a sum of positive squares in only one way, i.e., 130834124100 + 50653804096 = 361710^2 + 225064^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181487928191) 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, 45155475 + ... + 45159493.

Almost surely, 2^181487928196 is an apocalyptic number.

181487928196 is the 426014-th square number.

It is an amenable number.

181487928196 is a deficient number, since it is larger than the sum of its proper divisors (142302103425).

181487928196 is an frugal number, since it uses more digits than its factorization.

181487928196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148 (or 4074 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 64.

Multiplying 181487928196 by its sum of digits (64), we get a square (11615227404544 = 3408112²).

The spelling of 181487928196 in words is "one hundred eighty-one billion, four hundred eighty-seven million, nine hundred twenty-eight thousand, one hundred ninety-six".