639396092960 has 48 divisors (see below), whose sum is σ = 1599430527576. Its totient is φ = 240713822208.

The previous prime is 639396092911. The next prime is 639396092963. The reversal of 639396092960 is 69290693936.

It can be written as a sum of positive squares in 4 ways, for example, as 522549711376 + 116846381584 = 722876^2 + 341828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 639396092893 and 639396092902.

It is not an unprimeable number, because it can be changed into a prime (639396092963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117533327 + ... + 117538766.

Almost surely, 2^639396092960 is an apocalyptic number.

It is an amenable number.

639396092960 is an abundant number, since it is smaller than the sum of its proper divisors (960034434616).

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

639396092960 is a wasteful number, since it uses less digits than its factorization.

639396092960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235072125 (or 235072117 counting only the distinct ones).

The product of its (nonzero) digits is 25509168, while the sum is 62.

The spelling of 639396092960 in words is "six hundred thirty-nine billion, three hundred ninety-six million, ninety-two thousand, nine hundred sixty".