6442368616 has 16 divisors (see below), whose sum is σ = 12086584740. Its totient is φ = 3219279360.

The previous prime is 6442368613. The next prime is 6442368649. The reversal of 6442368616 is 6168632446.

It can be written as a sum of positive squares in 2 ways, for example, as 6440704516 + 1664100 = 80254^2 + 1290^2 .

It is a super-2 number, since 2×6442368616² = 83008226768843510912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6442368613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223695 + ... + 250846.

Almost surely, 2^6442368616 is an apocalyptic number.

It is an amenable number.

6442368616 is a deficient number, since it is larger than the sum of its proper divisors (5644216124).

6442368616 is a wasteful number, since it uses less digits than its factorization.

6442368616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476244 (or 476240 counting only the distinct ones).

The product of its digits is 995328, while the sum is 46.

The square root of 6442368616 is about 80264.3670379328. The cubic root of 6442368616 is about 1860.7235609382.

The spelling of 6442368616 in words is "six billion, four hundred forty-two million, three hundred sixty-eight thousand, six hundred sixteen".