640983306436 has 12 divisors (see below), whose sum is σ = 1223695403280. Its totient is φ = 291356048360.

The previous prime is 640983306419. The next prime is 640983306451. The reversal of 640983306436 is 634603389046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7283901166 + ... + 7283901253.

It is an arithmetic number, because the mean of its divisors is an integer number (101974616940).

Almost surely, 2^640983306436 is an apocalyptic number.

It is an amenable number.

640983306436 is a deficient number, since it is larger than the sum of its proper divisors (582712096844).

640983306436 is a wasteful number, since it uses less digits than its factorization.

640983306436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14567802434 (or 14567802432 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 640983306436 in words is "six hundred forty billion, nine hundred eighty-three million, three hundred six thousand, four hundred thirty-six".