638465832007 has 2 divisors, whose sum is σ = 638465832008. Its totient is φ = 638465832006.

The previous prime is 638465831921. The next prime is 638465832029. The reversal of 638465832007 is 700238564836.

638465832007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 638465832007 - 2¹⁵ = 638465799239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638465830007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319232916003 + 319232916004.

It is an arithmetic number, because the mean of its divisors is an integer number (319232916004).

Almost surely, 2^638465832007 is an apocalyptic number.

638465832007 is a deficient number, since it is larger than the sum of its proper divisors (1).

638465832007 is an equidigital number, since it uses as much as digits as its factorization.

638465832007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 638465832007 in words is "six hundred thirty-eight billion, four hundred sixty-five million, eight hundred thirty-two thousand, seven".