161063543570225 has 12 divisors (see below), whose sum is σ = 206605648994460. Its totient is φ = 124407702619200.

The previous prime is 161063543570219. The next prime is 161063543570227. The reversal of 161063543570225 is 522075345360161.

It can be written as a sum of positive squares in 6 ways, for example, as 6529771249 + 161057013798976 = 80807^2 + 12690824^2 .

It is a de Polignac number, because none of the positive numbers 2^k-161063543570225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161063543570227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111078305186 + ... + 111078306635.

It is an arithmetic number, because the mean of its divisors is an integer number (17217137416205).

Almost surely, 2^{161063543570225} is an apocalyptic number.

It is an amenable number.

161063543570225 is a deficient number, since it is larger than the sum of its proper divisors (45542105424235).

161063543570225 is a wasteful number, since it uses less digits than its factorization.

161063543570225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222156611860 (or 222156611855 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 161063543570225 in words is "one hundred sixty-one trillion, sixty-three billion, five hundred forty-three million, five hundred seventy thousand, two hundred twenty-five".