639700003064 has 32 divisors (see below), whose sum is σ = 1232361605280. Its totient is φ = 311077355904.

The previous prime is 639700003057. The next prime is 639700003079. The reversal of 639700003064 is 460300007936.

It is a happy number.

639700003064 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, 277949 + ... + 1164755.

It is an arithmetic number, because the mean of its divisors is an integer number (38511300165).

Almost surely, 2^639700003064 is an apocalyptic number.

It is an amenable number.

639700003064 is a deficient number, since it is larger than the sum of its proper divisors (592661602216).

639700003064 is a wasteful number, since it uses less digits than its factorization.

639700003064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889287 (or 889283 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 38.

The spelling of 639700003064 in words is "six hundred thirty-nine billion, seven hundred million, three thousand, sixty-four".