638468000396 has 24 divisors (see below), whose sum is σ = 1123571655024. Its totient is φ = 317447778240.

The previous prime is 638468000381. The next prime is 638468000399. The reversal of 638468000396 is 693000864836.

It is not an unprimeable number, because it can be changed into a prime (638468000399) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15562166 + ... + 15603138.

It is an arithmetic number, because the mean of its divisors is an integer number (46815485626).

Almost surely, 2^638468000396 is an apocalyptic number.

It is an amenable number.

638468000396 is a deficient number, since it is larger than the sum of its proper divisors (485103654628).

638468000396 is a wasteful number, since it uses less digits than its factorization.

638468000396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62681 (or 62679 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 638468000396 in words is "six hundred thirty-eight billion, four hundred sixty-eight million, three hundred ninety-six", and thus it is an aban number.