640202020600 has 48 divisors (see below), whose sum is σ = 1489939537320. Its totient is φ = 255827932800.

The previous prime is 640202020583. The next prime is 640202020609. The reversal of 640202020600 is 6020202046.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640202020609) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1377366 + ... + 1782565.

Almost surely, 2^640202020600 is an apocalyptic number.

It is an amenable number.

640202020600 is an abundant number, since it is smaller than the sum of its proper divisors (849737516720).

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

640202020600 is a wasteful number, since it uses less digits than its factorization.

640202020600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160960 (or 3160951 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 640202020600 its reverse (6020202046), we get a palindrome (646222222646).

The spelling of 640202020600 in words is "six hundred forty billion, two hundred two million, twenty thousand, six hundred".