161357168 has 20 divisors (see below), whose sum is σ = 357291120. Its totient is φ = 69153024.

The previous prime is 161357159. The next prime is 161357171. The reversal of 161357168 is 861753161.

161357168 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161357168² = 52072271329960448, 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, 720233 + ... + 720456.

It is an arithmetic number, because the mean of its divisors is an integer number (17864556).

Almost surely, 2^161357168 is an apocalyptic number.

It is an amenable number.

161357168 is an abundant number, since it is smaller than the sum of its proper divisors (195933952).

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

161357168 is a wasteful number, since it uses less digits than its factorization.

161357168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440704 (or 1440698 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 161357168 is about 12702.6441341951. The cubic root of 161357168 is about 544.4141706091.

The spelling of 161357168 in words is "one hundred sixty-one million, three hundred fifty-seven thousand, one hundred sixty-eight".