646345441 has 8 divisors (see below), whose sum is σ = 752618304. Its totient is φ = 543557040.

The previous prime is 646345421. The next prime is 646345451. The reversal of 646345441 is 144543646.

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 646345441 - 2⁵ = 646345409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646345441.

It is not an unprimeable number, because it can be changed into a prime (646345421) 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, 870715 + ... + 871456.

It is an arithmetic number, because the mean of its divisors is an integer number (94077288).

Almost surely, 2^646345441 is an apocalyptic number.

It is an amenable number.

646345441 is a deficient number, since it is larger than the sum of its proper divisors (106272863).

646345441 is a wasteful number, since it uses less digits than its factorization.

646345441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742231.

The product of its digits is 138240, while the sum is 37.

The square root of 646345441 is about 25423.3247432353. The cubic root of 646345441 is about 864.6126061083.

The spelling of 646345441 in words is "six hundred forty-six million, three hundred forty-five thousand, four hundred forty-one".