361645665 has 16 divisors (see below), whose sum is σ = 578942208. Its totient is φ = 192774656.

The previous prime is 361645657. The next prime is 361645667. The reversal of 361645665 is 566546163.

It is a cyclic number.

It is not a de Polignac number, because 361645665 - 2³ = 361645657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (361645667) 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 15 ways as a sum of consecutive naturals, for example, 28792 + ... + 39398.

It is an arithmetic number, because the mean of its divisors is an integer number (36183888).

Almost surely, 2^361645665 is an apocalyptic number.

It is an amenable number.

361645665 is a deficient number, since it is larger than the sum of its proper divisors (217296543).

361645665 is a wasteful number, since it uses less digits than its factorization.

361645665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12888.

The product of its digits is 388800, while the sum is 42.

The square root of 361645665 is about 19016.9835936197. The cubic root of 361645665 is about 712.4609864757.

The spelling of 361645665 in words is "three hundred sixty-one million, six hundred forty-five thousand, six hundred sixty-five".