5618551849 has 9 divisors (see below), whose sum is σ = 5875260573. Its totient is φ = 5372617932.

The previous prime is 5618551847. The next prime is 5618551859. The reversal of 5618551849 is 9481558165.

It is a happy number.

The square root of 5618551849 is 74957.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 5618551849 - 2¹ = 5618551847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5618551796 and 5618551805.

It is not an unprimeable number, because it can be changed into a prime (5618551847) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1722382 + ... + 1725640.

Almost surely, 2^5618551849 is an apocalyptic number.

5618551849 is the 74957-th square number.

5618551849 is the 37479-th centered octagonal number.

It is an amenable number.

5618551849 is a deficient number, since it is larger than the sum of its proper divisors (256708724).

5618551849 is an frugal number, since it uses more digits than its factorization.

5618551849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6564 (or 3282 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 52.

The cubic root of 5618551849 is about 1777.7668254419.

The spelling of 5618551849 in words is "five billion, six hundred eighteen million, five hundred fifty-one thousand, eight hundred forty-nine".