640828100719680 has 224 divisors, whose sum is σ = 2147550726236160. Its totient is φ = 161452286760960.

The previous prime is 640828100719637. The next prime is 640828100719691. The reversal of 640828100719680 is 86917001828046.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41171206 + ... + 54559365.

It is an arithmetic number, because the mean of its divisors is an integer number (9587280027840).

Almost surely, 2^{640828100719680} is an apocalyptic number.

640828100719680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640828100719680 is an abundant number, since it is smaller than the sum of its proper divisors (1506722625516480).

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

640828100719680 is a wasteful number, since it uses less digits than its factorization.

640828100719680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95730977 (or 95730967 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 60.

The spelling of 640828100719680 in words is "six hundred forty trillion, eight hundred twenty-eight billion, one hundred million, seven hundred nineteen thousand, six hundred eighty".