216452551444 has 6 divisors (see below), whose sum is σ = 378791965034. Its totient is φ = 108226275720.

The previous prime is 216452551319. The next prime is 216452551517. The reversal of 216452551444 is 444155254612.

It can be written as a sum of positive squares in only one way, i.e., 140728519044 + 75724032400 = 375138^2 + 275180^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216452551444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27056568927 + ... + 27056568934.

Almost surely, 2^216452551444 is an apocalyptic number.

It is an amenable number.

216452551444 is a deficient number, since it is larger than the sum of its proper divisors (162339413590).

216452551444 is a wasteful number, since it uses less digits than its factorization.

216452551444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54113137865 (or 54113137863 counting only the distinct ones).

The product of its digits is 768000, while the sum is 43.

The spelling of 216452551444 in words is "two hundred sixteen billion, four hundred fifty-two million, five hundred fifty-one thousand, four hundred forty-four".