125641165289 has 2 divisors, whose sum is σ = 125641165290. Its totient is φ = 125641165288.

The previous prime is 125641165259. The next prime is 125641165439. The reversal of 125641165289 is 982561146521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99230040064 + 26411125225 = 315008^2 + 162515^2 .

It is a cyclic number.

It is not a de Polignac number, because 125641165289 - 2³⁶ = 56921688553 is a prime.

It is not a weakly prime, because it can be changed into another prime (125641165249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62820582644 + 62820582645.

It is an arithmetic number, because the mean of its divisors is an integer number (62820582645).

Almost surely, 2^125641165289 is an apocalyptic number.

It is an amenable number.

125641165289 is a deficient number, since it is larger than the sum of its proper divisors (1).

125641165289 is an equidigital number, since it uses as much as digits as its factorization.

125641165289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 50.

The spelling of 125641165289 in words is "one hundred twenty-five billion, six hundred forty-one million, one hundred sixty-five thousand, two hundred eighty-nine".