5551561449 has 32 divisors (see below), whose sum is σ = 9467136000. Its totient is φ = 3149483472.

The previous prime is 5551561441. The next prime is 5551561469. The reversal of 5551561449 is 9441651555.

5551561449 is a `hidden beast` number, since 5 + 55 + 156 + 1 + 449 = 666.

It is not a de Polignac number, because 5551561449 - 2³ = 5551561441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5551561441) 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 31 ways as a sum of consecutive naturals, for example, 79389 + ... + 131930.

It is an arithmetic number, because the mean of its divisors is an integer number (295848000).

Almost surely, 2^5551561449 is an apocalyptic number.

It is an amenable number.

5551561449 is a deficient number, since it is larger than the sum of its proper divisors (3915574551).

5551561449 is a wasteful number, since it uses less digits than its factorization.

5551561449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211474 (or 211468 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The square root of 5551561449 is about 74508.8011512734. The cubic root of 5551561449 is about 1770.6730763931.

It can be divided in two parts, 55515 and 61449, that added together give a square (116964 = 342²).

The spelling of 5551561449 in words is "five billion, five hundred fifty-one million, five hundred sixty-one thousand, four hundred forty-nine".