161175125603957 has 2 divisors, whose sum is σ = 161175125603958. Its totient is φ = 161175125603956.

The previous prime is 161175125603903. The next prime is 161175125604037. The reversal of 161175125603957 is 759306521571161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160048585362961 + 1126540240996 = 12651031^2 + 1061386^2 .

It is a cyclic number.

It is not a de Polignac number, because 161175125603957 - 2⁴⁰ = 160075613976181 is a prime.

It is a super-2 number, since 2×161175125603957² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161175125603896 and 161175125603905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161175125609957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80587562801978 + 80587562801979.

It is an arithmetic number, because the mean of its divisors is an integer number (80587562801979).

Almost surely, 2^{161175125603957} is an apocalyptic number.

It is an amenable number.

161175125603957 is a deficient number, since it is larger than the sum of its proper divisors (1).

161175125603957 is an equidigital number, since it uses as much as digits as its factorization.

161175125603957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907000, while the sum is 59.

The spelling of 161175125603957 in words is "one hundred sixty-one trillion, one hundred seventy-five billion, one hundred twenty-five million, six hundred three thousand, nine hundred fifty-seven".