55537556 has 6 divisors (see below), whose sum is σ = 97190730. Its totient is φ = 27768776.

The previous prime is 55537543. The next prime is 55537567. The reversal of 55537556 is 65573555.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 10432900 = 6716^2 + 3230^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6942191 + ... + 6942198.

It is an arithmetic number, because the mean of its divisors is an integer number (16198455).

Almost surely, 2^55537556 is an apocalyptic number.

It is an amenable number.

55537556 is a deficient number, since it is larger than the sum of its proper divisors (41653174).

55537556 is a wasteful number, since it uses less digits than its factorization.

55537556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13884393 (or 13884391 counting only the distinct ones).

The product of its digits is 393750, while the sum is 41.

The square root of 55537556 is about 7452.3523802891. The cubic root of 55537556 is about 381.5302010380.

The spelling of 55537556 in words is "fifty-five million, five hundred thirty-seven thousand, five hundred fifty-six".