216867161108 has 24 divisors (see below), whose sum is σ = 408730450632. Its totient is φ = 100087818624.

The previous prime is 216867161087. The next prime is 216867161111. The reversal of 216867161108 is 801161768612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29146001284 + 187721159824 = 170722^2 + 433268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172066 + ... + 1344422.

It is an arithmetic number, because the mean of its divisors is an integer number (17030435443).

Almost surely, 2^216867161108 is an apocalyptic number.

It is an amenable number.

216867161108 is a deficient number, since it is larger than the sum of its proper divisors (191863289524).

216867161108 is a wasteful number, since it uses less digits than its factorization.

216867161108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196571 (or 196569 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 216867161108 in words is "two hundred sixteen billion, eight hundred sixty-seven million, one hundred sixty-one thousand, one hundred eight".