646020456001 has 4 divisors (see below), whose sum is σ = 653279112900. Its totient is φ = 638761799104.

The previous prime is 646020455959. The next prime is 646020456031. The reversal of 646020456001 is 100654020646.

646020456001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 337617940401 + 308402515600 = 581049^2 + 555340^2 .

It is a cyclic number.

It is not a de Polignac number, because 646020456001 - 2²⁵ = 645986901569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646020456031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629328316 + ... + 3629328493.

It is an arithmetic number, because the mean of its divisors is an integer number (163319778225).

Almost surely, 2^646020456001 is an apocalyptic number.

It is an amenable number.

646020456001 is a deficient number, since it is larger than the sum of its proper divisors (7258656899).

646020456001 is an equidigital number, since it uses as much as digits as its factorization.

646020456001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7258656898.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 646020456001 its reverse (100654020646), we get a palindrome (746674476647).

The spelling of 646020456001 in words is "six hundred forty-six billion, twenty million, four hundred fifty-six thousand, one".