216401052444 has 24 divisors (see below), whose sum is σ = 531511357440. Its totient is φ = 68337174384.

The previous prime is 216401052443. The next prime is 216401052481. The reversal of 216401052444 is 444250104612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216401052443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474563484 + ... + 474563939.

It is an arithmetic number, because the mean of its divisors is an integer number (22146306560).

Almost surely, 2^216401052444 is an apocalyptic number.

It is an amenable number.

216401052444 is an abundant number, since it is smaller than the sum of its proper divisors (315110304996).

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

216401052444 is a wasteful number, since it uses less digits than its factorization.

216401052444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949127449 (or 949127447 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The spelling of 216401052444 in words is "two hundred sixteen billion, four hundred one million, fifty-two thousand, four hundred forty-four".