216436245444 has 36 divisors (see below), whose sum is σ = 550159187760. Its totient is φ = 71742366000.

The previous prime is 216436245419. The next prime is 216436245457. The reversal of 216436245444 is 444542634612.

216436245444 is a `hidden beast` number, since 2 + 1 + 6 + 43 + 62 + 4 + 544 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 216436245444.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16787182 + ... + 16800069.

It is an arithmetic number, because the mean of its divisors is an integer number (15282199660).

Almost surely, 2^216436245444 is an apocalyptic number.

It is an amenable number.

216436245444 is an abundant number, since it is smaller than the sum of its proper divisors (333722942316).

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

216436245444 is a wasteful number, since it uses less digits than its factorization.

216436245444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33587440 (or 33587435 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 45.

The spelling of 216436245444 in words is "two hundred sixteen billion, four hundred thirty-six million, two hundred forty-five thousand, four hundred forty-four".