639091382272 has 192 divisors, whose sum is σ = 1483340040000. Its totient is φ = 269626638336.

The previous prime is 639091382263. The next prime is 639091382329. The reversal of 639091382272 is 272283190936.

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 15 ways as a sum of consecutive naturals, for example, 327906354 + ... + 327908302.

It is an arithmetic number, because the mean of its divisors is an integer number (7725729375).

Almost surely, 2^639091382272 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 639091382272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741670020000).

639091382272 is an abundant number, since it is smaller than the sum of its proper divisors (844248657728).

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

639091382272 is a wasteful number, since it uses less digits than its factorization.

639091382272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 639091382272 in words is "six hundred thirty-nine billion, ninety-one million, three hundred eighty-two thousand, two hundred seventy-two".