639068557272 has 32 divisors (see below), whose sum is σ = 1597699780080. Its totient is φ = 213019067520.

The previous prime is 639068557147. The next prime is 639068557301. The reversal of 639068557272 is 272755860936.

It is a congruent number.

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, 1363122 + ... + 1770942.

Almost surely, 2^639068557272 is an apocalyptic number.

It is an amenable number.

639068557272 is an abundant number, since it is smaller than the sum of its proper divisors (958631222808).

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

639068557272 is a wasteful number, since it uses less digits than its factorization.

639068557272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473123 (or 473119 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 639068557272 in words is "six hundred thirty-nine billion, sixty-eight million, five hundred fifty-seven thousand, two hundred seventy-two".