16446246664 has 16 divisors (see below), whose sum is σ = 30849634620. Its totient is φ = 8219677440.

The previous prime is 16446246643. The next prime is 16446246671. The reversal of 16446246664 is 46664264461.

It can be written as a sum of positive squares in 2 ways, for example, as 15462922500 + 983324164 = 124350^2 + 31358^2 .

It is a super-2 number, since 2×16446246664² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410397 + ... + 448684.

Almost surely, 2^16446246664 is an apocalyptic number.

It is an amenable number.

16446246664 is a deficient number, since it is larger than the sum of its proper divisors (14403387956).

16446246664 is a wasteful number, since it uses less digits than its factorization.

16446246664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861480 (or 861476 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 49.

The spelling of 16446246664 in words is "sixteen billion, four hundred forty-six million, two hundred forty-six thousand, six hundred sixty-four".