55661204 has 6 divisors (see below), whose sum is σ = 97407114. Its totient is φ = 27830600.

The previous prime is 55661197. The next prime is 55661239. The reversal of 55661204 is 40216655.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 9604 = 7460^2 + 98^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6957647 + ... + 6957654.

It is an arithmetic number, because the mean of its divisors is an integer number (16234519).

Almost surely, 2^55661204 is an apocalyptic number.

It is an amenable number.

55661204 is a deficient number, since it is larger than the sum of its proper divisors (41745910).

55661204 is a wasteful number, since it uses less digits than its factorization.

55661204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13915305 (or 13915303 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55661204 is about 7460.6436719629. The cubic root of 55661204 is about 381.8131355823.

Adding to 55661204 its reverse (40216655), we get a palindrome (95877859).

The spelling of 55661204 in words is "fifty-five million, six hundred sixty-one thousand, two hundred four".