10503265561 has 2 divisors, whose sum is σ = 10503265562. Its totient is φ = 10503265560.

The previous prime is 10503265511. The next prime is 10503265603. The reversal of 10503265561 is 16556230501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6379057161 + 4124208400 = 79869^2 + 64220^2 .

It is an emirp because it is prime and its reverse (16556230501) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10503265561 is a prime.

It is a super-2 number, since 2×10503265561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10503265511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5251632780 + 5251632781.

It is an arithmetic number, because the mean of its divisors is an integer number (5251632781).

Almost surely, 2^10503265561 is an apocalyptic number.

It is an amenable number.

10503265561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10503265561 is an equidigital number, since it uses as much as digits as its factorization.

10503265561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 10503265561 in words is "ten billion, five hundred three million, two hundred sixty-five thousand, five hundred sixty-one".