55105553563 has 2 divisors, whose sum is σ = 55105553564. Its totient is φ = 55105553562.

The previous prime is 55105553551. The next prime is 55105553599. The reversal of 55105553563 is 36535550155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55105553563 is a prime.

It is not a weakly prime, because it can be changed into another prime (55105553663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27552776781 + 27552776782.

It is an arithmetic number, because the mean of its divisors is an integer number (27552776782).

Almost surely, 2^55105553563 is an apocalyptic number.

55105553563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55105553563 is an equidigital number, since it uses as much as digits as its factorization.

55105553563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 843750, while the sum is 43.

The spelling of 55105553563 in words is "fifty-five billion, one hundred five million, five hundred fifty-three thousand, five hundred sixty-three".