640192000000 has 364 divisors, whose sum is σ = 1830153136240. Its totient is φ = 219340800000.

The previous prime is 640191999961. The next prime is 640192000013. The reversal of 640192000000 is 291046.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 447999286 + ... + 448000714.

Almost surely, 2^640192000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640192000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915076568120).

640192000000 is an abundant number, since it is smaller than the sum of its proper divisors (1189961136240).

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

640192000000 is an frugal number, since it uses more digits than its factorization.

640192000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 640192000000 its reverse (291046), we get a palindrome (640192291046).

The spelling of 640192000000 in words is "six hundred forty billion, one hundred ninety-two million", and thus it is an aban number.