646043043 has 8 divisors (see below), whose sum is σ = 864594000. Its totient is φ = 429093728.

The previous prime is 646043029. The next prime is 646043053. The reversal of 646043043 is 340340646.

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 646043043 - 2¹⁴ = 646026659 is a prime.

It is a super-2 number, since 2×646043043² = 834743226817399698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646043043.

It is not an unprimeable number, because it can be changed into a prime (646043003) 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, 399468 + ... + 401081.

It is an arithmetic number, because the mean of its divisors is an integer number (108074250).

Almost surely, 2^646043043 is an apocalyptic number.

646043043 is a deficient number, since it is larger than the sum of its proper divisors (218550957).

646043043 is a wasteful number, since it uses less digits than its factorization.

646043043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800821.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 646043043 is about 25417.3767922656. The cubic root of 646043043 is about 864.4777463816.

Adding to 646043043 its reverse (340340646), we get a palindrome (986383689).

The spelling of 646043043 in words is "six hundred forty-six million, forty-three thousand, forty-three".