161025007135757 has 2 divisors, whose sum is σ = 161025007135758. Its totient is φ = 161025007135756.

The previous prime is 161025007135747. The next prime is 161025007135789. The reversal of 161025007135757 is 757531700520161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144830008597156 + 16194998538601 = 12034534^2 + 4024301^2 .

It is a cyclic number.

It is not a de Polignac number, because 161025007135757 - 2¹⁸ = 161025006873613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161025007135747) 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, 80512503567878 + 80512503567879.

It is an arithmetic number, because the mean of its divisors is an integer number (80512503567879).

Almost surely, 2^{161025007135757} is an apocalyptic number.

It is an amenable number.

161025007135757 is a deficient number, since it is larger than the sum of its proper divisors (1).

161025007135757 is an equidigital number, since it uses as much as digits as its factorization.

161025007135757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1543500, while the sum is 50.

The spelling of 161025007135757 in words is "one hundred sixty-one trillion, twenty-five billion, seven million, one hundred thirty-five thousand, seven hundred fifty-seven".