10010555561 has 2 divisors, whose sum is σ = 10010555562. Its totient is φ = 10010555560.

The previous prime is 10010555551. The next prime is 10010555567. The reversal of 10010555561 is 16555501001.

It is a happy number.

10010555561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8881931536 + 1128624025 = 94244^2 + 33595^2 .

It is a cyclic number.

It is not a de Polignac number, because 10010555561 - 2⁶ = 10010555497 is a prime.

It is a super-2 number, since 2×10010555561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10010555567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005277780 + 5005277781.

It is an arithmetic number, because the mean of its divisors is an integer number (5005277781).

Almost surely, 2^10010555561 is an apocalyptic number.

It is an amenable number.

10010555561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010555561 is an equidigital number, since it uses as much as digits as its factorization.

10010555561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 10010555561 in words is "ten billion, ten million, five hundred fifty-five thousand, five hundred sixty-one".