16409688556 has 12 divisors (see below), whose sum is σ = 28729155168. Its totient is φ = 8201358512.

The previous prime is 16409688527. The next prime is 16409688557. The reversal of 16409688556 is 65588690461.

It is a self number, because there is not a number n which added to its sum of digits gives 16409688556.

It is not an unprimeable number, because it can be changed into a prime (16409688557) 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, 860836 + ... + 879691.

It is an arithmetic number, because the mean of its divisors is an integer number (2394096264).

Almost surely, 2^16409688556 is an apocalyptic number.

It is an amenable number.

16409688556 is a deficient number, since it is larger than the sum of its proper divisors (12319466612).

16409688556 is a wasteful number, since it uses less digits than its factorization.

16409688556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742888 (or 1742886 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 16409688556 in words is "sixteen billion, four hundred nine million, six hundred eighty-eight thousand, five hundred fifty-six".