361131665 has 8 divisors (see below), whose sum is σ = 441534888. Its totient is φ = 283454080.

The previous prime is 361131653. The next prime is 361131677. The reversal of 361131665 is 566131163.

It is an interprime number because it is at equal distance from previous prime (361131653) and next prime (361131677).

It can be written as a sum of positive squares in 4 ways, for example, as 155725441 + 205406224 = 12479^2 + 14332^2 .

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

It is not a de Polignac number, because 361131665 - 2⁶ = 361131601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681116 + ... + 681645.

It is an arithmetic number, because the mean of its divisors is an integer number (55191861).

Almost surely, 2^361131665 is an apocalyptic number.

It is an amenable number.

361131665 is a deficient number, since it is larger than the sum of its proper divisors (80403223).

361131665 is a wasteful number, since it uses less digits than its factorization.

361131665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362819.

The product of its digits is 9720, while the sum is 32.

The square root of 361131665 is about 19003.4645525494. The cubic root of 361131665 is about 712.1232907577.

The spelling of 361131665 in words is "three hundred sixty-one million, one hundred thirty-one thousand, six hundred sixty-five".