216557750144 has 32 divisors (see below), whose sum is σ = 431913565440. Its totient is φ = 108155914240.

The previous prime is 216557750141. The next prime is 216557750159. The reversal of 216557750144 is 441057755612.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×216557750144² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216557750141) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 847424 + ... + 1072959.

It is an arithmetic number, because the mean of its divisors is an integer number (13497298920).

Almost surely, 2^216557750144 is an apocalyptic number.

It is an amenable number.

216557750144 is a deficient number, since it is larger than the sum of its proper divisors (215355815296).

216557750144 is an equidigital number, since it uses as much as digits as its factorization.

216557750144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921278 (or 1921266 counting only the distinct ones).

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 216557750144 in words is "two hundred sixteen billion, five hundred fifty-seven million, seven hundred fifty thousand, one hundred forty-four".