6402660788736 has 160 divisors (see below), whose sum is σ = 19776335483520. Its totient is φ = 2041427976192.

The previous prime is 6402660788729. The next prime is 6402660788737. The reversal of 6402660788736 is 6378870662046.

It is not an unprimeable number, because it can be changed into a prime (6402660788737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9750645 + ... + 10386548.

It is an arithmetic number, because the mean of its divisors is an integer number (123602096772).

Almost surely, 2^{6402660788736} is an apocalyptic number.

It is an amenable number.

6402660788736 is an abundant number, since it is smaller than the sum of its proper divisors (13373674694784).

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

6402660788736 is a wasteful number, since it uses less digits than its factorization.

6402660788736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20137243 (or 20137221 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 63.

The spelling of 6402660788736 in words is "six trillion, four hundred two billion, six hundred sixty million, seven hundred eighty-eight thousand, seven hundred thirty-six".