216144344331356 has 12 divisors (see below), whose sum is σ = 432288688662768. Its totient is φ = 92633290427712.

The previous prime is 216144344331313. The next prime is 216144344331379. The reversal of 216144344331356 is 653133443441612.

216144344331356 is an admirable number.

It is a super-2 number, since 2×216144344331356² (a number of 29 digits) contains 22 as substring.

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, 3859720434461 + ... + 3859720434516.

It is an arithmetic number, because the mean of its divisors is an integer number (36024057388564).

Almost surely, 2^{216144344331356} is an apocalyptic number.

It is an amenable number.

216144344331356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216144344331356 is a wasteful number, since it uses less digits than its factorization.

216144344331356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719440868988 (or 7719440868986 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 50.

Adding to 216144344331356 its reverse (653133443441612), we get a palindrome (869277787772968).

The spelling of 216144344331356 in words is "two hundred sixteen trillion, one hundred forty-four billion, three hundred forty-four million, three hundred thirty-one thousand, three hundred fifty-six".