819782027144 has 8 divisors (see below), whose sum is σ = 1537091300910. Its totient is φ = 409891013568.

The previous prime is 819782027093. The next prime is 819782027153. The reversal of 819782027144 is 441720287918.

It can be written as a sum of positive squares in only one way, i.e., 704528567044 + 115253460100 = 839362^2 + 339490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51236376689 + ... + 51236376704.

Almost surely, 2^819782027144 is an apocalyptic number.

It is an amenable number.

819782027144 is a deficient number, since it is larger than the sum of its proper divisors (717309273766).

819782027144 is a wasteful number, since it uses less digits than its factorization.

819782027144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102472753399 (or 102472753395 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 819782027144 in words is "eight hundred nineteen billion, seven hundred eighty-two million, twenty-seven thousand, one hundred forty-four".