55649449 has 16 divisors (see below), whose sum is σ = 60575040. Its totient is φ = 50928640.

The previous prime is 55649441. The next prime is 55649453. The reversal of 55649449 is 94494655.

It is a cyclic number.

It is not a de Polignac number, because 55649449 - 2³ = 55649441 is a prime.

It is a super-2 number, since 2×55649449² = 6193722348007202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55649399 and 55649408.

It is not an unprimeable number, because it can be changed into a prime (55649441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113094 + ... + 113584.

It is an arithmetic number, because the mean of its divisors is an integer number (3785940).

Almost surely, 2^55649449 is an apocalyptic number.

55649449 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

55649449 is a deficient number, since it is larger than the sum of its proper divisors (4925591).

55649449 is a wasteful number, since it uses less digits than its factorization.

55649449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its digits is 777600, while the sum is 46.

The square root of 55649449 is about 7459.8558297061. The cubic root of 55649449 is about 381.7862555230.

It can be divided in two parts, 556 and 49449, that added together give a palindrome (50005).

The spelling of 55649449 in words is "fifty-five million, six hundred forty-nine thousand, four hundred forty-nine".