16861655432 has 8 divisors (see below), whose sum is σ = 31615603950. Its totient is φ = 8430827712.

The previous prime is 16861655423. The next prime is 16861655497. The reversal of 16861655432 is 23455616861.

It can be written as a sum of positive squares in only one way, i.e., 14188144996 + 2673510436 = 119114^2 + 51706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053853457 + ... + 1053853472.

Almost surely, 2^16861655432 is an apocalyptic number.

It is an amenable number.

16861655432 is a deficient number, since it is larger than the sum of its proper divisors (14753948518).

16861655432 is a wasteful number, since it uses less digits than its factorization.

16861655432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107706935 (or 2107706931 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The spelling of 16861655432 in words is "sixteen billion, eight hundred sixty-one million, six hundred fifty-five thousand, four hundred thirty-two".