161736173608 has 16 divisors (see below), whose sum is σ = 303719738580. Its totient is φ = 80744243328.

The previous prime is 161736173593. The next prime is 161736173611. The reversal of 161736173608 is 806371637161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161731056964 + 5116644 = 402158^2 + 2262^2 .

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, 15474885 + ... + 15485332.

Almost surely, 2^161736173608 is an apocalyptic number.

It is an amenable number.

161736173608 is a deficient number, since it is larger than the sum of its proper divisors (141983564972).

161736173608 is a wasteful number, since it uses less digits than its factorization.

161736173608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30960876 (or 30960872 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 161736173608 in words is "one hundred sixty-one billion, seven hundred thirty-six million, one hundred seventy-three thousand, six hundred eight".