55673649 has 40 divisors (see below), whose sum is σ = 87163560. Its totient is φ = 35368704.

The previous prime is 55673647. The next prime is 55673677. The reversal of 55673649 is 94637655.

It can be written as a sum of positive squares in 4 ways, for example, as 22496049 + 33177600 = 4743^2 + 5760^2 .

It is not a de Polignac number, because 55673649 - 2¹ = 55673647 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55673647) 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 39 ways as a sum of consecutive naturals, for example, 321727 + ... + 321899.

It is an arithmetic number, because the mean of its divisors is an integer number (2179089).

Almost surely, 2^55673649 is an apocalyptic number.

It is an amenable number.

55673649 is a deficient number, since it is larger than the sum of its proper divisors (31489911).

55673649 is a wasteful number, since it uses less digits than its factorization.

55673649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 342 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 55673649 is about 7461.4776686659. The cubic root of 55673649 is about 381.8415893349.

It can be divided in two parts, 5567 and 3649, that added together give a square (9216 = 96²).

The spelling of 55673649 in words is "fifty-five million, six hundred seventy-three thousand, six hundred forty-nine".