171663166372 has 12 divisors (see below), whose sum is σ = 318081749580. Its totient is φ = 80782666496.

The previous prime is 171663166357. The next prime is 171663166391. The reversal of 171663166372 is 273661366171.

It can be written as a sum of positive squares in 2 ways, for example, as 86338419556 + 85324746816 = 293834^2 + 292104^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262229097 + ... + 1262229232.

It is an arithmetic number, because the mean of its divisors is an integer number (26506812465).

Almost surely, 2^171663166372 is an apocalyptic number.

It is an amenable number.

171663166372 is a deficient number, since it is larger than the sum of its proper divisors (146418583208).

171663166372 is a wasteful number, since it uses less digits than its factorization.

171663166372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524458350 (or 2524458348 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 49.

The spelling of 171663166372 in words is "one hundred seventy-one billion, six hundred sixty-three million, one hundred sixty-six thousand, three hundred seventy-two".