6400000000002 has 48 divisors (see below), whose sum is σ = 15206600119680. Its totient is φ = 1789665649632.

The previous prime is 6399999999983. The next prime is 6400000000081. The reversal of 6400000000002 is 2000000000046.

It is a junction number, because it is equal to n+sod(n) for n = 6399999999897 and 6399999999906.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231568177 + ... + 231595812.

It is an arithmetic number, because the mean of its divisors is an integer number (316804169160).

Almost surely, 2^{6400000000002} is an apocalyptic number.

6400000000002 is an abundant number, since it is smaller than the sum of its proper divisors (8806600119678).

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

6400000000002 is a wasteful number, since it uses less digits than its factorization.

6400000000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463164055 (or 463164048 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 6400000000002 its reverse (2000000000046), we get a palindrome (8400000000048).

The spelling of 6400000000002 in words is "six trillion, four hundred billion, two", and thus it is an aban number.