639284212322 has 54 divisors (see below), whose sum is σ = 1185211802241. Its totient is φ = 257808264000.

The previous prime is 639284212289. The next prime is 639284212337. The reversal of 639284212322 is 223212482936.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 585088837921 + 54195374401 = 764911^2 + 232799^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=565369.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 134555447 + ... + 134560197.

Almost surely, 2^639284212322 is an apocalyptic number.

639284212322 is a deficient number, since it is larger than the sum of its proper divisors (545927589919).

639284212322 is an frugal number, since it uses more digits than its factorization.

639284212322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9552 (or 4777 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The spelling of 639284212322 in words is "six hundred thirty-nine billion, two hundred eighty-four million, two hundred twelve thousand, three hundred twenty-two".