161461968 has 20 divisors (see below), whose sum is σ = 417110208. Its totient is φ = 53820640.

The previous prime is 161461939. The next prime is 161461987. The reversal of 161461968 is 869164161.

It is a super-2 number, since 2×161461968² = 52139934220866048, which contains 22 as substring.

It is a congruent number.

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, 1681848 + ... + 1681943.

Almost surely, 2^161461968 is an apocalyptic number.

It is an amenable number.

161461968 is an abundant number, since it is smaller than the sum of its proper divisors (255648240).

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

161461968 is a wasteful number, since it uses less digits than its factorization.

161461968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363802 (or 3363796 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 161461968 is about 12706.7685900075. The cubic root of 161461968 is about 544.5320091038.

The spelling of 161461968 in words is "one hundred sixty-one million, four hundred sixty-one thousand, nine hundred sixty-eight".