10261557161 has 2 divisors, whose sum is σ = 10261557162. Its totient is φ = 10261557160.

The previous prime is 10261557143. The next prime is 10261557169. The reversal of 10261557161 is 16175516201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7365072400 + 2896484761 = 85820^2 + 53819^2 .

It is a cyclic number.

It is not a de Polignac number, because 10261557161 - 2¹⁴ = 10261540777 is a prime.

It is not a weakly prime, because it can be changed into another prime (10261557169) 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, 5130778580 + 5130778581.

It is an arithmetic number, because the mean of its divisors is an integer number (5130778581).

Almost surely, 2^10261557161 is an apocalyptic number.

It is an amenable number.

10261557161 is a deficient number, since it is larger than the sum of its proper divisors (1).

10261557161 is an equidigital number, since it uses as much as digits as its factorization.

10261557161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 10261557161 in words is "ten billion, two hundred sixty-one million, five hundred fifty-seven thousand, one hundred sixty-one".