646465344743 has 4 divisors (see below), whose sum is σ = 646605246648. Its totient is φ = 646325442840.

The previous prime is 646465344727. The next prime is 646465344779. The reversal of 646465344743 is 347443564646.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646465344743 - 2⁴ = 646465344727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646465334743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69944021 + ... + 69953262.

It is an arithmetic number, because the mean of its divisors is an integer number (161651311662).

Almost surely, 2^646465344743 is an apocalyptic number.

646465344743 is a deficient number, since it is larger than the sum of its proper divisors (139901905).

646465344743 is a wasteful number, since it uses less digits than its factorization.

646465344743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139901904.

The product of its digits is 69672960, while the sum is 56.

The spelling of 646465344743 in words is "six hundred forty-six billion, four hundred sixty-five million, three hundred forty-four thousand, seven hundred forty-three".