55616563 has 2 divisors, whose sum is σ = 55616564. Its totient is φ = 55616562.

The previous prime is 55616549. The next prime is 55616593. The reversal of 55616563 is 36561655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55616563 is a prime.

It is not a weakly prime, because it can be changed into another prime (55616593) 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, 27808281 + 27808282.

It is an arithmetic number, because the mean of its divisors is an integer number (27808282).

Almost surely, 2^55616563 is an apocalyptic number.

55616563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55616563 is an equidigital number, since it uses as much as digits as its factorization.

55616563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The square root of 55616563 is about 7457.6513058737. The cubic root of 55616563 is about 381.7110352705.

The spelling of 55616563 in words is "fifty-five million, six hundred sixteen thousand, five hundred sixty-three".