216332116431556 has 6 divisors (see below), whose sum is σ = 378581203755230. Its totient is φ = 108166058215776.

The previous prime is 216332116431551. The next prime is 216332116431569. The reversal of 216332116431556 is 655134611233612.

It can be written as a sum of positive squares in only one way, i.e., 180489551929600 + 35842564501956 = 13434640^2 + 5986866^2 .

It is a super-2 number, since 2×216332116431556² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216332116431551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27041514553941 + ... + 27041514553948.

Almost surely, 2^{216332116431556} is an apocalyptic number.

It is an amenable number.

216332116431556 is a deficient number, since it is larger than the sum of its proper divisors (162249087323674).

216332116431556 is a wasteful number, since it uses less digits than its factorization.

216332116431556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54083029107893 (or 54083029107891 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 49.

The spelling of 216332116431556 in words is "two hundred sixteen trillion, three hundred thirty-two billion, one hundred sixteen million, four hundred thirty-one thousand, five hundred fifty-six".