639020975040000 has 8000 divisors, whose sum is σ = 3068440079265792. Its totient is φ = 128994508800000.

The previous prime is 639020975039971. The next prime is 639020975040037. The reversal of 639020975040000 is 40579020936.

It is a happy number.

639020975040000 is a `hidden beast` number, since 6 + 3 + 90 + 20 + 97 + 50 + 400 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (8000).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 799 ways as a sum of consecutive naturals, for example, 3920374079919 + ... + 3920374080081.

Almost surely, 2^{639020975040000} is an apocalyptic number.

639020975040000 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 639020975040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534220039632896).

639020975040000 is an abundant number, since it is smaller than the sum of its proper divisors (2429419104225792).

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

639020975040000 is a wasteful number, since it uses less digits than its factorization.

639020975040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 639020975040000 in words is "six hundred thirty-nine trillion, twenty billion, nine hundred seventy-five million, forty thousand".