383645561 has 8 divisors (see below), whose sum is σ = 413919744. Its totient is φ = 353480400.

The previous prime is 383645539. The next prime is 383645597. The reversal of 383645561 is 165546383.

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

It is not a de Polignac number, because 383645561 - 2¹⁰ = 383644537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383645861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19865 + ... + 34086.

It is an arithmetic number, because the mean of its divisors is an integer number (51739968).

Almost surely, 2^383645561 is an apocalyptic number.

It is an amenable number.

383645561 is a deficient number, since it is larger than the sum of its proper divisors (30274183).

383645561 is a wasteful number, since it uses less digits than its factorization.

383645561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54511.

The product of its digits is 259200, while the sum is 41.

The square root of 383645561 is about 19586.8721596890. The cubic root of 383645561 is about 726.6245369014.

The spelling of 383645561 in words is "three hundred eighty-three million, six hundred forty-five thousand, five hundred sixty-one".