361616181 has 4 divisors (see below), whose sum is σ = 482154912. Its totient is φ = 241077452.

The previous prime is 361616179. The next prime is 361616239. The reversal of 361616181 is 181616163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 361616181 - 2¹ = 361616179 is a prime.

It is a super-4 number, since 4×361616181⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361616161) 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, 60269361 + ... + 60269366.

It is an arithmetic number, because the mean of its divisors is an integer number (120538728).

Almost surely, 2^361616181 is an apocalyptic number.

It is an amenable number.

361616181 is a deficient number, since it is larger than the sum of its proper divisors (120538731).

361616181 is a wasteful number, since it uses less digits than its factorization.

361616181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120538730.

The product of its digits is 5184, while the sum is 33.

The square root of 361616181 is about 19016.2083760144. The cubic root of 361616181 is about 712.4416242725.

The spelling of 361616181 in words is "three hundred sixty-one million, six hundred sixteen thousand, one hundred eighty-one".