646040513034043 has 8 divisors (see below), whose sum is σ = 648616405474800. Its totient is φ = 643464636672000.

The previous prime is 646040513034011. The next prime is 646040513034061. The reversal of 646040513034043 is 340430315040646.

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 646040513034043 - 2⁵ = 646040513034011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646040513034083) 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, 79993771 + ... + 87698827.

It is an arithmetic number, because the mean of its divisors is an integer number (81077050684350).

Almost surely, 2^{646040513034043} is an apocalyptic number.

646040513034043 is a deficient number, since it is larger than the sum of its proper divisors (2575892440757).

646040513034043 is a wasteful number, since it uses less digits than its factorization.

646040513034043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039357.

The product of its (nonzero) digits is 1244160, while the sum is 43.

Adding to 646040513034043 its reverse (340430315040646), we get a palindrome (986470828074689).

The spelling of 646040513034043 in words is "six hundred forty-six trillion, forty billion, five hundred thirteen million, thirty-four thousand, forty-three".