639230198176 has 48 divisors (see below), whose sum is σ = 1314123580224. Its totient is φ = 305504049664.

The previous prime is 639230198143. The next prime is 639230198219. The reversal of 639230198176 is 671891032936.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745956 + ... + 1354588.

It is an arithmetic number, because the mean of its divisors is an integer number (27377574588).

Almost surely, 2^639230198176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639230198176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657061790112).

639230198176 is an abundant number, since it is smaller than the sum of its proper divisors (674893382048).

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

639230198176 is a wasteful number, since it uses less digits than its factorization.

639230198176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610093 (or 610085 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 639230198176 in words is "six hundred thirty-nine billion, two hundred thirty million, one hundred ninety-eight thousand, one hundred seventy-six".