161788066525 has 12 divisors (see below), whose sum is σ = 205282720192. Its totient is φ = 126420441840.

The previous prime is 161788066493. The next prime is 161788066529. The reversal of 161788066525 is 525660887161.

It is not a de Polignac number, because 161788066525 - 2⁵ = 161788066493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161788066529) 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 in 11 ways as a sum of consecutive naturals, for example, 75249189 + ... + 75251338.

Almost surely, 2^161788066525 is an apocalyptic number.

It is an amenable number.

161788066525 is a deficient number, since it is larger than the sum of its proper divisors (43494653667).

161788066525 is a wasteful number, since it uses less digits than its factorization.

161788066525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150500580 (or 150500575 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 161788066525 in words is "one hundred sixty-one billion, seven hundred eighty-eight million, sixty-six thousand, five hundred twenty-five".