638206872883 has 16 divisors (see below), whose sum is σ = 651657726720. Its totient is φ = 624809469024.

The previous prime is 638206872851. The next prime is 638206872997. The reversal of 638206872883 is 388278602836.

It is a cyclic number.

It is not a de Polignac number, because 638206872883 - 2⁵ = 638206872851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638206872383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67437610 + ... + 67447072.

It is an arithmetic number, because the mean of its divisors is an integer number (40728607920).

Almost surely, 2^638206872883 is an apocalyptic number.

638206872883 is a deficient number, since it is larger than the sum of its proper divisors (13450853837).

638206872883 is a wasteful number, since it uses less digits than its factorization.

638206872883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138.

The product of its (nonzero) digits is 37158912, while the sum is 61.

The spelling of 638206872883 in words is "six hundred thirty-eight billion, two hundred six million, eight hundred seventy-two thousand, eight hundred eighty-three".