639119439980 has 48 divisors (see below), whose sum is σ = 1533941048640. Its totient is φ = 219118894848.

The previous prime is 639119439961. The next prime is 639119440051. The reversal of 639119439980 is 89934911936.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5029466 + ... + 5154974.

It is an arithmetic number, because the mean of its divisors is an integer number (31957105180).

Almost surely, 2^639119439980 is an apocalyptic number.

It is an amenable number.

639119439980 is an abundant number, since it is smaller than the sum of its proper divisors (894821608660).

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

639119439980 is a wasteful number, since it uses less digits than its factorization.

639119439980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161898 (or 161896 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 62.

The spelling of 639119439980 in words is "six hundred thirty-nine billion, one hundred nineteen million, four hundred thirty-nine thousand, nine hundred eighty".