55618799 has 4 divisors (see below), whose sum is σ = 55680240. Its totient is φ = 55557360.

The previous prime is 55618753. The next prime is 55618811. The reversal of 55618799 is 99781655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99781655 = 5 ⋅19956331.

It is a cyclic number.

It is not a de Polignac number, because 55618799 - 2¹² = 55614703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55618499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29342 + ... + 31179.

It is an arithmetic number, because the mean of its divisors is an integer number (13920060).

Almost surely, 2^55618799 is an apocalyptic number.

55618799 is a deficient number, since it is larger than the sum of its proper divisors (61441).

55618799 is an equidigital number, since it uses as much as digits as its factorization.

55618799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61440.

The product of its digits is 680400, while the sum is 50.

The square root of 55618799 is about 7457.8012175171. The cubic root of 55618799 is about 381.7161506198.

The spelling of 55618799 in words is "fifty-five million, six hundred eighteen thousand, seven hundred ninety-nine".