645415005212 has 12 divisors (see below), whose sum is σ = 1155743149176. Its totient is φ = 315202676880.

The previous prime is 645415005211. The next prime is 645415005251. The reversal of 645415005212 is 212500514546.

645415005212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645415005211) 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, 1876206239 + ... + 1876206582.

It is an arithmetic number, because the mean of its divisors is an integer number (96311929098).

Almost surely, 2^645415005212 is an apocalyptic number.

It is an amenable number.

645415005212 is a deficient number, since it is larger than the sum of its proper divisors (510328143964).

645415005212 is a wasteful number, since it uses less digits than its factorization.

645415005212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752412868 (or 3752412866 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 645415005212 its reverse (212500514546), we get a palindrome (857915519758).

The spelling of 645415005212 in words is "six hundred forty-five billion, four hundred fifteen million, five thousand, two hundred twelve".