125005716161161 has 6 divisors (see below), whose sum is σ = 137402977268186. Its totient is φ = 113641560146400.

The previous prime is 125005716161119. The next prime is 125005716161201. The reversal of 125005716161161 is 161161617500521.

It can be written as a sum of positive squares in only one way, i.e., 76861060497936 + 48144655663225 = 8767044^2 + 6938635^2 .

It is not a de Polignac number, because 125005716161161 - 2⁹ = 125005716160649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125005716161101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 516552546000 + ... + 516552546241.

Almost surely, 2^{125005716161161} is an apocalyptic number.

125005716161161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125005716161161 is a deficient number, since it is larger than the sum of its proper divisors (12397261107025).

125005716161161 is a wasteful number, since it uses less digits than its factorization.

125005716161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033105092263 (or 1033105092252 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 43.

The spelling of 125005716161161 in words is "one hundred twenty-five trillion, five billion, seven hundred sixteen million, one hundred sixty-one thousand, one hundred sixty-one".