639143319360 has 896 divisors, whose sum is σ = 2546850668544. Its totient is φ = 132219371520.

The previous prime is 639143319359. The next prime is 639143319421. The reversal of 639143319360 is 63913341936.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent 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 127 ways as a sum of consecutive naturals, for example, 1312409037 + ... + 1312409523.

It is an arithmetic number, because the mean of its divisors is an integer number (2842467264).

Almost surely, 2^639143319360 is an apocalyptic number.

639143319360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639143319360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273425334272).

639143319360 is an abundant number, since it is smaller than the sum of its proper divisors (1907707349184).

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

639143319360 is a wasteful number, since it uses less digits than its factorization.

639143319360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 48.

The spelling of 639143319360 in words is "six hundred thirty-nine billion, one hundred forty-three million, three hundred nineteen thousand, three hundred sixty".