646455443511 has 8 divisors (see below), whose sum is σ = 865121185024. Its totient is φ = 429379998840.

The previous prime is 646455443479. The next prime is 646455443519. The reversal of 646455443511 is 115344554646.

646455443511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646455443511 - 2⁵ = 646455443479 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 (646455443519) 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, 397573261 + ... + 397574886.

It is an arithmetic number, because the mean of its divisors is an integer number (108140148128).

Almost surely, 2^646455443511 is an apocalyptic number.

646455443511 is a deficient number, since it is larger than the sum of its proper divisors (218665741513).

646455443511 is a wasteful number, since it uses less digits than its factorization.

646455443511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795148421.

The product of its digits is 3456000, while the sum is 48.

The spelling of 646455443511 in words is "six hundred forty-six billion, four hundred fifty-five million, four hundred forty-three thousand, five hundred eleven".