640510004212 has 24 divisors (see below), whose sum is σ = 1207143426272. Its totient is φ = 295613042400.

The previous prime is 640510004171. The next prime is 640510004221. The reversal of 640510004212 is 212400015046.

It is a happy number.

640510004212 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2568787 + ... + 2807077.

Almost surely, 2^640510004212 is an apocalyptic number.

It is an amenable number.

640510004212 is a deficient number, since it is larger than the sum of its proper divisors (566633422060).

640510004212 is a wasteful number, since it uses less digits than its factorization.

640510004212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289999 (or 289997 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 640510004212 its reverse (212400015046), we get a palindrome (852910019258).

The spelling of 640510004212 in words is "six hundred forty billion, five hundred ten million, four thousand, two hundred twelve".