638352041448 has 32 divisors (see below), whose sum is σ = 1740960113760. Its totient is φ = 193440012480.

The previous prime is 638352041419. The next prime is 638352041471. The reversal of 638352041448 is 844140253836.

It is a junction number, because it is equal to n+sod(n) for n = 638352041397 and 638352041406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1208999815 + ... + 1209000342.

It is an arithmetic number, because the mean of its divisors is an integer number (54405003555).

Almost surely, 2^638352041448 is an apocalyptic number.

It is an amenable number.

638352041448 is an abundant number, since it is smaller than the sum of its proper divisors (1102608072312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638352041448 is a wasteful number, since it uses less digits than its factorization.

638352041448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418000177 (or 2418000173 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 638352041448 in words is "six hundred thirty-eight billion, three hundred fifty-two million, forty-one thousand, four hundred forty-eight".