639751119460 has 12 divisors (see below), whose sum is σ = 1343477350908. Its totient is φ = 255900447776.

The previous prime is 639751119439. The next prime is 639751119461. The reversal of 639751119460 is 64911157936.

It can be written as a sum of positive squares in 2 ways, for example, as 470165290596 + 169585828864 = 685686^2 + 411808^2 .

It is a junction number, because it is equal to n+sod(n) for n = 639751119398 and 639751119407.

It is not an unprimeable number, because it can be changed into a prime (639751119461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15993777967 + ... + 15993778006.

It is an arithmetic number, because the mean of its divisors is an integer number (111956445909).

Almost surely, 2^639751119460 is an apocalyptic number.

It is an amenable number.

639751119460 is an abundant number, since it is smaller than the sum of its proper divisors (703726231448).

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

639751119460 is a wasteful number, since it uses less digits than its factorization.

639751119460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31987555982 (or 31987555980 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 639751119460 in words is "six hundred thirty-nine billion, seven hundred fifty-one million, one hundred nineteen thousand, four hundred sixty".