639168882248 has 108 divisors (see below), whose sum is σ = 1379626423515. Its totient is φ = 277430939136.

The previous prime is 639168882241. The next prime is 639168882257. The reversal of 639168882248 is 842288861936.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 259123757764 + 380045124484 = 509042^2 + 616478^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=565318.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639168882241) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 499740473 + ... + 499741751.

Almost surely, 2^639168882248 is an apocalyptic number.

639168882248 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639168882248

639168882248 is an abundant number, since it is smaller than the sum of its proper divisors (740457541267).

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

639168882248 is a wasteful number, since it uses less digits than its factorization.

639168882248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624 (or 1311 counting only the distinct ones).

The product of its digits is 63700992, while the sum is 65.

The spelling of 639168882248 in words is "six hundred thirty-nine billion, one hundred sixty-eight million, eight hundred eighty-two thousand, two hundred forty-eight".