639152663018 has 16 divisors (see below), whose sum is σ = 975308719104. Its totient is φ = 314096791680.

The previous prime is 639152662987. The next prime is 639152663111. The reversal of 639152663018 is 810366251936.

It is a happy number.

It is a super-2 number, since 2×639152663018² (a number of 24 digits) contains 22 as substring.

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, 11731463 + ... + 11785818.

It is an arithmetic number, because the mean of its divisors is an integer number (60956794944).

Almost surely, 2^639152663018 is an apocalyptic number.

639152663018 is a deficient number, since it is larger than the sum of its proper divisors (336156056086).

639152663018 is a wasteful number, since it uses less digits than its factorization.

639152663018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23517517.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 639152663018 in words is "six hundred thirty-nine billion, one hundred fifty-two million, six hundred sixty-three thousand, eighteen".