640829002600 has 48 divisors (see below), whose sum is σ = 1510912357920. Its totient is φ = 252721291200.

The previous prime is 640829002573. The next prime is 640829002603. The reversal of 640829002600 is 6200928046.

It is a self number, because there is not a number n which added to its sum of digits gives 640829002600.

It is not an unprimeable number, because it can be changed into a prime (640829002603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22550202 + ... + 22578601.

It is an arithmetic number, because the mean of its divisors is an integer number (31477340790).

Almost surely, 2^640829002600 is an apocalyptic number.

It is an amenable number.

640829002600 is an abundant number, since it is smaller than the sum of its proper divisors (870083355320).

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

640829002600 is a wasteful number, since it uses less digits than its factorization.

640829002600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45128890 (or 45128881 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 640829002600 in words is "six hundred forty billion, eight hundred twenty-nine million, two thousand, six hundred".