216531757116 has 48 divisors (see below), whose sum is σ = 564740225280. Its totient is φ = 71745047280.

The previous prime is 216531757109. The next prime is 216531757147. The reversal of 216531757116 is 611757135612.

216531757116 is a `hidden beast` number, since 2 + 1 + 6 + 53 + 17 + 571 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5984730 + ... + 6020801.

It is an arithmetic number, because the mean of its divisors is an integer number (11765421360).

Almost surely, 2^216531757116 is an apocalyptic number.

It is an amenable number.

216531757116 is an abundant number, since it is smaller than the sum of its proper divisors (348208468164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216531757116 is a wasteful number, since it uses less digits than its factorization.

216531757116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12005711 (or 12005703 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The spelling of 216531757116 in words is "two hundred sixteen billion, five hundred thirty-one million, seven hundred fifty-seven thousand, one hundred sixteen".