55918556 has 6 divisors (see below), whose sum is σ = 97857480. Its totient is φ = 27959276.

The previous prime is 55918523. The next prime is 55918567. The reversal of 55918556 is 65581955.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989816 + ... + 6989823.

It is an arithmetic number, because the mean of its divisors is an integer number (16309580).

Almost surely, 2^55918556 is an apocalyptic number.

It is an amenable number.

55918556 is a deficient number, since it is larger than the sum of its proper divisors (41938924).

55918556 is a wasteful number, since it uses less digits than its factorization.

55918556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13979643 (or 13979641 counting only the distinct ones).

The product of its digits is 270000, while the sum is 44.

The square root of 55918556 is about 7477.8710874152. The cubic root of 55918556 is about 382.4006742255.

The spelling of 55918556 in words is "fifty-five million, nine hundred eighteen thousand, five hundred fifty-six".