638280852992 has 40 divisors (see below), whose sum is σ = 1277821116000. Its totient is φ = 318513301504.

The previous prime is 638280852977. The next prime is 638280853043. The reversal of 638280852992 is 299258082836.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963992 + ... + 1485207.

It is an arithmetic number, because the mean of its divisors is an integer number (31945527900).

Almost surely, 2^638280852992 is an apocalyptic number.

It is an amenable number.

638280852992 is an abundant number, since it is smaller than the sum of its proper divisors (639540263008).

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

638280852992 is an equidigital number, since it uses as much as digits as its factorization.

638280852992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449726 (or 2449710 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 62.

The spelling of 638280852992 in words is "six hundred thirty-eight billion, two hundred eighty million, eight hundred fifty-two thousand, nine hundred ninety-two".