55648813 has 8 divisors (see below), whose sum is σ = 62666496. Its totient is φ = 48957600.

The previous prime is 55648787. The next prime is 55648843. The reversal of 55648813 is 31884655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55648813 - 2⁹ = 55648301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55648843) 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 7 ways as a sum of consecutive naturals, for example, 81256 + ... + 81937.

It is an arithmetic number, because the mean of its divisors is an integer number (7833312).

Almost surely, 2^55648813 is an apocalyptic number.

It is an amenable number.

55648813 is a deficient number, since it is larger than the sum of its proper divisors (7017683).

55648813 is a wasteful number, since it uses less digits than its factorization.

55648813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163235.

The product of its digits is 115200, while the sum is 40.

The square root of 55648813 is about 7459.8132014146. The cubic root of 55648813 is about 381.7848010792.

It can be divided in two parts, 556 and 48813, that multiplied together give a triangular number (27140028 = T₇₃₆₇).

The spelling of 55648813 in words is "fifty-five million, six hundred forty-eight thousand, eight hundred thirteen".