639853162 has 8 divisors (see below), whose sum is σ = 1033608996. Its totient is φ = 295316832.

The previous prime is 639853147. The next prime is 639853189. The reversal of 639853162 is 261358936.

It can be written as a sum of positive squares in 2 ways, for example, as 639128961 + 724201 = 25281^2 + 851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 12304843 + ... + 12304894.

Almost surely, 2^639853162 is an apocalyptic number.

639853162 is a deficient number, since it is larger than the sum of its proper divisors (393755834).

639853162 is a wasteful number, since it uses less digits than its factorization.

639853162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24609752.

The product of its digits is 233280, while the sum is 43.

The square root of 639853162 is about 25295.3189740711. The cubic root of 639853162 is about 861.7079641215.

The spelling of 639853162 in words is "six hundred thirty-nine million, eight hundred fifty-three thousand, one hundred sixty-two".