6385408403638 has 24 divisors (see below), whose sum is σ = 10630221782544. Its totient is φ = 2874279146640.

The previous prime is 6385408403603. The next prime is 6385408403669. The reversal of 6385408403638 is 8363048045836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128062381 + ... + 128112232.

It is an arithmetic number, because the mean of its divisors is an integer number (442925907606).

Almost surely, 2^{6385408403638} is an apocalyptic number.

6385408403638 is a deficient number, since it is larger than the sum of its proper divisors (4244813378906).

6385408403638 is a wasteful number, since it uses less digits than its factorization.

6385408403638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256174740 (or 256174729 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 58.

The spelling of 6385408403638 in words is "six trillion, three hundred eighty-five billion, four hundred eight million, four hundred three thousand, six hundred thirty-eight".