25928963161 has 2 divisors, whose sum is σ = 25928963162. Its totient is φ = 25928963160.

The previous prime is 25928963143. The next prime is 25928963167. The reversal of 25928963161 is 16136982952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24076177225 + 1852785936 = 155165^2 + 43044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25928963161 is a prime.

It is a super-2 number, since 2×25928963161² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25928963099 and 25928963108.

It is not a weakly prime, because it can be changed into another prime (25928963167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12964481580 + 12964481581.

It is an arithmetic number, because the mean of its divisors is an integer number (12964481581).

Almost surely, 2^25928963161 is an apocalyptic number.

It is an amenable number.

25928963161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25928963161 is an equidigital number, since it uses as much as digits as its factorization.

25928963161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The spelling of 25928963161 in words is "twenty-five billion, nine hundred twenty-eight million, nine hundred sixty-three thousand, one hundred sixty-one".