161728432348 has 18 divisors (see below), whose sum is σ = 329232880536. Its totient is φ = 69312185208.

The previous prime is 161728432301. The next prime is 161728432373. The reversal of 161728432348 is 843234827161.

It is a super-2 number, since 2×161728432348² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412572336 + ... + 412572727.

Almost surely, 2^161728432348 is an apocalyptic number.

It is an amenable number.

161728432348 is an abundant number, since it is smaller than the sum of its proper divisors (167504448188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161728432348 is a wasteful number, since it uses less digits than its factorization.

161728432348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825145081 (or 825145072 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 49.

The spelling of 161728432348 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, three hundred forty-eight".