161612716776625 has 32 divisors (see below), whose sum is σ = 218523385986048. Its totient is φ = 118854988358400.

The previous prime is 161612716776559. The next prime is 161612716776631. The reversal of 161612716776625 is 526677617216161.

It is not a de Polignac number, because 161612716776625 - 2²⁷ = 161612582558897 is a prime.

It is a super-2 number, since 2×161612716776625² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 884246337 + ... + 884429086.

It is an arithmetic number, because the mean of its divisors is an integer number (6828855812064).

Almost surely, 2^{161612716776625} is an apocalyptic number.

It is an amenable number.

161612716776625 is a deficient number, since it is larger than the sum of its proper divisors (56910669209423).

161612716776625 is a wasteful number, since it uses less digits than its factorization.

161612716776625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768675498 (or 1768675488 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 64.

The spelling of 161612716776625 in words is "one hundred sixty-one trillion, six hundred twelve billion, seven hundred sixteen million, seven hundred seventy-six thousand, six hundred twenty-five".