55665056563 has 2 divisors, whose sum is σ = 55665056564. Its totient is φ = 55665056562.

The previous prime is 55665056477. The next prime is 55665056663. The reversal of 55665056563 is 36565056655.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55665056563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55665056563.

It is not a weakly prime, because it can be changed into another prime (55665056663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832528281 + 27832528282.

It is an arithmetic number, because the mean of its divisors is an integer number (27832528282).

Almost surely, 2^55665056563 is an apocalyptic number.

55665056563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55665056563 is an equidigital number, since it uses as much as digits as its factorization.

55665056563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150000, while the sum is 52.

The spelling of 55665056563 in words is "fifty-five billion, six hundred sixty-five million, fifty-six thousand, five hundred sixty-three".