182171897793 has 6 divisors (see below), whose sum is σ = 263137185714. Its totient is φ = 121447931856.

The previous prime is 182171897749. The next prime is 182171897797. The reversal of 182171897793 is 397798171281.

It can be written as a sum of positive squares in only one way, i.e., 100645659009 + 81526238784 = 317247^2 + 285528^2 .

It is not a de Polignac number, because 182171897793 - 2¹² = 182171893697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 182171897793.

It is not an unprimeable number, because it can be changed into a prime (182171897797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10120660980 + ... + 10120660997.

It is an arithmetic number, because the mean of its divisors is an integer number (43856197619).

Almost surely, 2^182171897793 is an apocalyptic number.

It is an amenable number.

182171897793 is a deficient number, since it is larger than the sum of its proper divisors (80965287921).

182171897793 is a wasteful number, since it uses less digits than its factorization.

182171897793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20241321983 (or 20241321980 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 63.

Adding to 182171897793 its sum of digits (63), we get a square (182171897856 = 426816²).

The spelling of 182171897793 in words is "one hundred eighty-two billion, one hundred seventy-one million, eight hundred ninety-seven thousand, seven hundred ninety-three".