646143413 has 8 divisors (see below), whose sum is σ = 663924096. Its totient is φ = 628488000.

The previous prime is 646143383. The next prime is 646143427. The reversal of 646143413 is 314341646.

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

It is not a de Polignac number, because 646143413 - 2¹⁰ = 646142389 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 646143413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646143473) 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, 20813 + ... + 41538.

It is an arithmetic number, because the mean of its divisors is an integer number (82990512).

Almost surely, 2^646143413 is an apocalyptic number.

It is an amenable number.

646143413 is a deficient number, since it is larger than the sum of its proper divisors (17780683).

646143413 is a wasteful number, since it uses less digits than its factorization.

646143413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62635.

The product of its digits is 20736, while the sum is 32.

The square root of 646143413 is about 25419.3511522226. The cubic root of 646143413 is about 864.5225128201.

The spelling of 646143413 in words is "six hundred forty-six million, one hundred forty-three thousand, four hundred thirteen".