646455443512 has 16 divisors (see below), whose sum is σ = 1212169461840. Its totient is φ = 323210253696.

The previous prime is 646455443479. The next prime is 646455443519. The reversal of 646455443512 is 215344554646.

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 3 ways as a sum of consecutive naturals, for example, 2025553 + ... + 2322880.

It is an arithmetic number, because the mean of its divisors is an integer number (75760591365).

Almost surely, 2^646455443512 is an apocalyptic number.

It is an amenable number.

646455443512 is a deficient number, since it is larger than the sum of its proper divisors (565714018328).

646455443512 is a wasteful number, since it uses less digits than its factorization.

646455443512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367022 (or 4367018 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 49.

The spelling of 646455443512 in words is "six hundred forty-six billion, four hundred fifty-five million, four hundred forty-three thousand, five hundred twelve".