55918663 has 2 divisors, whose sum is σ = 55918664. Its totient is φ = 55918662.

The previous prime is 55918651. The next prime is 55918679. The reversal of 55918663 is 36681955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55918663 - 2⁵ = 55918631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55918633) 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 as a sum of consecutive naturals, namely, 27959331 + 27959332.

It is an arithmetic number, because the mean of its divisors is an integer number (27959332).

Almost surely, 2^55918663 is an apocalyptic number.

55918663 is a deficient number, since it is larger than the sum of its proper divisors (1).

55918663 is an equidigital number, since it uses as much as digits as its factorization.

55918663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 55918663 is about 7477.8782418544. The cubic root of 55918663 is about 382.4009181328.

The spelling of 55918663 in words is "fifty-five million, nine hundred eighteen thousand, six hundred sixty-three".