161675644 has 48 divisors (see below), whose sum is σ = 331406208. Its totient is φ = 68318208.

The previous prime is 161675557. The next prime is 161675651. The reversal of 161675644 is 446576161.

It is a super-2 number, since 2×161675644² = 52278027725629472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161675597 and 161675606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30237 + ... + 35179.

It is an arithmetic number, because the mean of its divisors is an integer number (6904296).

Almost surely, 2^161675644 is an apocalyptic number.

It is an amenable number.

161675644 is an abundant number, since it is smaller than the sum of its proper divisors (169730564).

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

161675644 is a wasteful number, since it uses less digits than its factorization.

161675644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014 (or 5012 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 161675644 is about 12715.1737699490. The cubic root of 161675644 is about 544.7721113273.

The spelling of 161675644 in words is "one hundred sixty-one million, six hundred seventy-five thousand, six hundred forty-four".