55575555 has 48 divisors (see below), whose sum is σ = 104799744. Its totient is φ = 25072320.

The previous prime is 55575523. The next prime is 55575563. The reversal of 55575555 is 55557555.

It is not a de Polignac number, because 55575555 - 2⁵ = 55575523 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60550 + ... + 61460.

It is an arithmetic number, because the mean of its divisors is an integer number (2183328).

Almost surely, 2^55575555 is an apocalyptic number.

55575555 is a deficient number, since it is larger than the sum of its proper divisors (49224189).

55575555 is a wasteful number, since it uses less digits than its factorization.

55575555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 1009 counting only the distinct ones).

The product of its digits is 546875, while the sum is 42.

The square root of 55575555 is about 7454.9014077988. The cubic root of 55575555 is about 381.6171959890.

The spelling of 55575555 in words is "fifty-five million, five hundred seventy-five thousand, five hundred fifty-five".