638873228203 has 24 divisors (see below), whose sum is σ = 774600852480. Its totient is φ = 524795740560.

The previous prime is 638873228197. The next prime is 638873228243. The reversal of 638873228203 is 302822378836.

It is a de Polignac number, because none of the positive numbers 2^k-638873228203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638873228243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1885233 + ... + 2198146.

It is an arithmetic number, because the mean of its divisors is an integer number (32275035520).

Almost surely, 2^638873228203 is an apocalyptic number.

638873228203 is a deficient number, since it is larger than the sum of its proper divisors (135727624277).

638873228203 is a wasteful number, since it uses less digits than its factorization.

638873228203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083527 (or 4083520 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 638873228203 in words is "six hundred thirty-eight billion, eight hundred seventy-three million, two hundred twenty-eight thousand, two hundred three".