10550105561 has 2 divisors, whose sum is σ = 10550105562. Its totient is φ = 10550105560.

The previous prime is 10550105551. The next prime is 10550105569. The reversal of 10550105561 is 16550105501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8624651161 + 1925454400 = 92869^2 + 43880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10550105561 is a prime.

It is a super-2 number, since 2×10550105561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10550105569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275052780 + 5275052781.

It is an arithmetic number, because the mean of its divisors is an integer number (5275052781).

Almost surely, 2^10550105561 is an apocalyptic number.

It is an amenable number.

10550105561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10550105561 is an equidigital number, since it uses as much as digits as its factorization.

10550105561 is an evil number, because the sum of its binary digits is even.

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

The spelling of 10550105561 in words is "ten billion, five hundred fifty million, one hundred five thousand, five hundred sixty-one".