646143141 has 16 divisors (see below), whose sum is σ = 984984704. Its totient is φ = 369080064.

The previous prime is 646143073. The next prime is 646143143. The reversal of 646143141 is 141341646.

It is not a de Polignac number, because 646143141 - 2¹⁰ = 646142117 is a prime.

It is a super-2 number, since 2×646143141² = 835001917322691762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646143099 and 646143108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646143143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72945 + ... + 81321.

It is an arithmetic number, because the mean of its divisors is an integer number (61561544).

Almost surely, 2^646143141 is an apocalyptic number.

It is an amenable number.

646143141 is a deficient number, since it is larger than the sum of its proper divisors (338841563).

646143141 is a wasteful number, since it uses less digits than its factorization.

646143141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12060.

The product of its digits is 6912, while the sum is 30.

The square root of 646143141 is about 25419.3458019674. The cubic root of 646143141 is about 864.5223915105.

Adding to 646143141 its reverse (141341646), we get a palindrome (787484787).

The spelling of 646143141 in words is "six hundred forty-six million, one hundred forty-three thousand, one hundred forty-one".