10166561539 has 2 divisors, whose sum is σ = 10166561540. Its totient is φ = 10166561538.

The previous prime is 10166561491. The next prime is 10166561549. The reversal of 10166561539 is 93516566101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10166561539 - 2²³ = 10158172931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10166561495 and 10166561504.

It is not a weakly prime, because it can be changed into another prime (10166561549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5083280769 + 5083280770.

It is an arithmetic number, because the mean of its divisors is an integer number (5083280770).

Almost surely, 2^10166561539 is an apocalyptic number.

10166561539 is a deficient number, since it is larger than the sum of its proper divisors (1).

10166561539 is an equidigital number, since it uses as much as digits as its factorization.

10166561539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 10166561539 in words is "ten billion, one hundred sixty-six million, five hundred sixty-one thousand, five hundred thirty-nine".