55577799 has 16 divisors (see below), whose sum is σ = 83190240. Its totient is φ = 36668160.

The previous prime is 55577791. The next prime is 55577803. The reversal of 55577799 is 99777555.

It is not a de Polignac number, because 55577799 - 2³ = 55577791 is a prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55577791) 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 15 ways as a sum of consecutive naturals, for example, 7992 + ... + 13229.

It is an arithmetic number, because the mean of its divisors is an integer number (5199390).

Almost surely, 2^55577799 is an apocalyptic number.

55577799 is a deficient number, since it is larger than the sum of its proper divisors (27612441).

55577799 is a wasteful number, since it uses less digits than its factorization.

55577799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21327 (or 21321 counting only the distinct ones).

The product of its digits is 3472875, while the sum is 54.

The square root of 55577799 is about 7455.0519112881. The cubic root of 55577799 is about 381.6223321648.

The spelling of 55577799 in words is "fifty-five million, five hundred seventy-seven thousand, seven hundred ninety-nine".