216161776 has 20 divisors (see below), whose sum is σ = 423522000. Its totient is φ = 106865792.

The previous prime is 216161713. The next prime is 216161801. The reversal of 216161776 is 677161612.

It is a congruent number.

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, 74476 + ... + 77323.

It is an arithmetic number, because the mean of its divisors is an integer number (21176100).

Almost surely, 2^216161776 is an apocalyptic number.

It is an amenable number.

216161776 is a deficient number, since it is larger than the sum of its proper divisors (207360224).

216161776 is a wasteful number, since it uses less digits than its factorization.

216161776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151896 (or 151890 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 216161776 is about 14702.4411578486. The cubic root of 216161776 is about 600.1497552118.

The spelling of 216161776 in words is "two hundred sixteen million, one hundred sixty-one thousand, seven hundred seventy-six".