180613381 has 8 divisors (see below), whose sum is σ = 194620664. Its totient is φ = 166622400.

The previous prime is 180613379. The next prime is 180613417. The reversal of 180613381 is 183316081.

It can be written as a sum of positive squares in 4 ways, for example, as 68062500 + 112550881 = 8250^2 + 10609^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 180613381 - 2¹ = 180613379 is a prime.

It is a super-2 number, since 2×180613381² = 65242386792502322, which 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 (180613361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28831 + ... + 34531.

It is an arithmetic number, because the mean of its divisors is an integer number (24327583).

Almost surely, 2^180613381 is an apocalyptic number.

It is an amenable number.

180613381 is a deficient number, since it is larger than the sum of its proper divisors (14007283).

180613381 is a wasteful number, since it uses less digits than its factorization.

180613381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 180613381 is about 13439.2477840093. The cubic root of 180613381 is about 565.2622386700.

The spelling of 180613381 in words is "one hundred eighty million, six hundred thirteen thousand, three hundred eighty-one".