10505555555503 has 2 divisors, whose sum is σ = 10505555555504. Its totient is φ = 10505555555502.

The previous prime is 10505555555479. The next prime is 10505555555531. The reversal of 10505555555503 is 30555555550501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10505555555503 - 2²⁹ = 10505018684591 is a prime.

It is a super-2 number, since 2×10505555555503² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10505555555203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252777777751 + 5252777777752.

It is an arithmetic number, because the mean of its divisors is an integer number (5252777777752).

Almost surely, 2^{10505555555503} is an apocalyptic number.

10505555555503 is a deficient number, since it is larger than the sum of its proper divisors (1).

10505555555503 is an equidigital number, since it uses as much as digits as its factorization.

10505555555503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5859375, while the sum is 49.

The spelling of 10505555555503 in words is "ten trillion, five hundred five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred three".