16716663111556 has 12 divisors (see below), whose sum is σ = 29543805598860. Its totient is φ = 8275575797600.

The previous prime is 16716663111523. The next prime is 16716663111601. The reversal of 16716663111556 is 65511136661761.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14754310405956 + 1962352705600 = 3841134^2 + 1400840^2 .

It is a super-2 number, since 2×16716663111556² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16716663111497 and 16716663111506.

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, 20688939091 + ... + 20688939898.

It is an arithmetic number, because the mean of its divisors is an integer number (2461983799905).

Almost surely, 2^{16716663111556} is an apocalyptic number.

It is an amenable number.

16716663111556 is a deficient number, since it is larger than the sum of its proper divisors (12827142487304).

16716663111556 is a wasteful number, since it uses less digits than its factorization.

16716663111556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41377879094 (or 41377879092 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 55.

The spelling of 16716663111556 in words is "sixteen trillion, seven hundred sixteen billion, six hundred sixty-three million, one hundred eleven thousand, five hundred fifty-six".