182809835381 has 4 divisors (see below), whose sum is σ = 186259077612. Its totient is φ = 179360593152.

The previous prime is 182809835333. The next prime is 182809835401. The reversal of 182809835381 is 183538908281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156479580625 + 26330254756 = 395575^2 + 162266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-182809835381 is a prime.

It is a super-2 number, since 2×182809835381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182809835881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724621036 + ... + 1724621141.

It is an arithmetic number, because the mean of its divisors is an integer number (46564769403).

Almost surely, 2^182809835381 is an apocalyptic number.

It is an amenable number.

182809835381 is a deficient number, since it is larger than the sum of its proper divisors (3449242231).

182809835381 is an equidigital number, since it uses as much as digits as its factorization.

182809835381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449242230.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 182809835381 in words is "one hundred eighty-two billion, eight hundred nine million, eight hundred thirty-five thousand, three hundred eighty-one".