639142163550000 has 1440 divisors, whose sum is σ = 2536416378961920. Its totient is φ = 148811040000000.

The previous prime is 639142163549959. The next prime is 639142163550019. The reversal of 639142163550000 is 55361241936.

639142163550000 is a `hidden beast` number, since 6 + 3 + 9 + 1 + 4 + 2 + 1 + 635 + 5 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 27418038345 + ... + 27418061655.

It is an arithmetic number, because the mean of its divisors is an integer number (1761400263168).

Almost surely, 2^{639142163550000} is an apocalyptic number.

639142163550000 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 639142163550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268208189480960).

639142163550000 is an abundant number, since it is smaller than the sum of its proper divisors (1897274215411920).

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

639142163550000 is a wasteful number, since it uses less digits than its factorization.

639142163550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23581 (or 23552 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 639142163550000 in words is "six hundred thirty-nine trillion, one hundred forty-two billion, one hundred sixty-three million, five hundred fifty thousand".