16446332646 has 24 divisors (see below), whose sum is σ = 35652422520. Its totient is φ = 5479233696.

The previous prime is 16446332611. The next prime is 16446332647. The reversal of 16446332646 is 64623364461.

16446332646 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 633 + 2 + 6 + 4 + 6 = 666.

It is a super-2 number, since 2×16446332646² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16446332647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204376 + ... + 273243.

It is an arithmetic number, because the mean of its divisors is an integer number (1485517605).

Almost surely, 2^16446332646 is an apocalyptic number.

16446332646 is an abundant number, since it is smaller than the sum of its proper divisors (19206089874).

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

16446332646 is a wasteful number, since it uses less digits than its factorization.

16446332646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479540 (or 479537 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 45.

The spelling of 16446332646 in words is "sixteen billion, four hundred forty-six million, three hundred thirty-two thousand, six hundred forty-six".