6402663616 has 112 divisors (see below), whose sum is σ = 13651626240. Its totient is φ = 2972712960.

The previous prime is 6402663613. The next prime is 6402663661. The reversal of 6402663616 is 6163662046.

It is not an unprimeable number, because it can be changed into a prime (6402663613) 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, 14786536 + ... + 14786968.

It is an arithmetic number, because the mean of its divisors is an integer number (121889520).

Almost surely, 2^6402663616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6402663616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6825813120).

6402663616 is an abundant number, since it is smaller than the sum of its proper divisors (7248962624).

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

6402663616 is a wasteful number, since it uses less digits than its factorization.

6402663616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 6402663616 is about 80016.6458682192. The cubic root of 6402663616 is about 1856.8930687681.

The spelling of 6402663616 in words is "six billion, four hundred two million, six hundred sixty-three thousand, six hundred sixteen".