1918855449 has 12 divisors (see below), whose sum is σ = 3167634496. Its totient is φ = 1096488792.

The previous prime is 1918855369. The next prime is 1918855457. The reversal of 1918855449 is 9445588191.

1918855449 is a `hidden beast` number, since 1 + 9 + 1 + 88 + 554 + 4 + 9 = 666.

It is not a de Polignac number, because 1918855449 - 2⁷ = 1918855321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1918855395 and 1918855404.

It is not an unprimeable number, because it can be changed into a prime (1918855489) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 15228949 + ... + 15229074.

Almost surely, 2^1918855449 is an apocalyptic number.

It is an amenable number.

1918855449 is a deficient number, since it is larger than the sum of its proper divisors (1248779047).

1918855449 is a wasteful number, since it uses less digits than its factorization.

1918855449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30458036 (or 30458033 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

The square root of 1918855449 is about 43804.7423117635. The cubic root of 1918855449 is about 1242.6459820354.

The spelling of 1918855449 in words is "one billion, nine hundred eighteen million, eight hundred fifty-five thousand, four hundred forty-nine".