618789844 has 6 divisors (see below), whose sum is σ = 1082882234. Its totient is φ = 309394920.

The previous prime is 618789811. The next prime is 618789859. The reversal of 618789844 is 448987816.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 548028100 + 70761744 = 23410^2 + 8412^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77348727 + ... + 77348734.

Almost surely, 2^618789844 is an apocalyptic number.

It is an amenable number.

618789844 is a deficient number, since it is larger than the sum of its proper divisors (464092390).

618789844 is a wasteful number, since it uses less digits than its factorization.

618789844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154697465 (or 154697463 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 55.

The square root of 618789844 is about 24875.4868093069. The cubic root of 618789844 is about 852.1467507877.

The spelling of 618789844 in words is "six hundred eighteen million, seven hundred eighty-nine thousand, eight hundred forty-four".