16611433616 has 10 divisors (see below), whose sum is σ = 32184652662. Its totient is φ = 8305716800.

The previous prime is 16611433561. The next prime is 16611433637. The reversal of 16611433616 is 61633411661.

It can be written as a sum of positive squares in only one way, i.e., 14519286016 + 2092147600 = 120496^2 + 45740^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16611433616.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519107285 + ... + 519107316.

Almost surely, 2^16611433616 is an apocalyptic number.

16611433616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16611433616 is a deficient number, since it is larger than the sum of its proper divisors (15573219046).

16611433616 is a wasteful number, since it uses less digits than its factorization.

16611433616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038214609 (or 1038214603 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The spelling of 16611433616 in words is "sixteen billion, six hundred eleven million, four hundred thirty-three thousand, six hundred sixteen".