638450054836 has 12 divisors (see below), whose sum is σ = 1218859195680. Its totient is φ = 290204570360.

The previous prime is 638450054813. The next prime is 638450054861.

638450054836 is nontrivially palindromic in base 10.

638450054836 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 3 ways as a sum of consecutive naturals, for example, 7255114216 + ... + 7255114303.

It is an arithmetic number, because the mean of its divisors is an integer number (101571599640).

Almost surely, 2^638450054836 is an apocalyptic number.

It is an amenable number.

638450054836 is a deficient number, since it is larger than the sum of its proper divisors (580409140844).

638450054836 is a wasteful number, since it uses less digits than its factorization.

638450054836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14510228534 (or 14510228532 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 638450054836 in words is "six hundred thirty-eight billion, four hundred fifty million, fifty-four thousand, eight hundred thirty-six".