161995948 has 6 divisors (see below), whose sum is σ = 283492916. Its totient is φ = 80997972.

The previous prime is 161995937. The next prime is 161995949. The reversal of 161995948 is 849599161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161995895 and 161995904.

It is not an unprimeable number, because it can be changed into a prime (161995949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20249490 + ... + 20249497.

Almost surely, 2^161995948 is an apocalyptic number.

It is an amenable number.

161995948 is a deficient number, since it is larger than the sum of its proper divisors (121496968).

161995948 is a wasteful number, since it uses less digits than its factorization.

161995948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40498991 (or 40498989 counting only the distinct ones).

The product of its digits is 699840, while the sum is 52.

The square root of 161995948 is about 12727.7628827693. The cubic root of 161995948 is about 545.1316327669.

The spelling of 161995948 in words is "one hundred sixty-one million, nine hundred ninety-five thousand, nine hundred forty-eight".