161795738 has 16 divisors (see below), whose sum is σ = 263954376. Its totient is φ = 73934400.

The previous prime is 161795737. The next prime is 161795741. The reversal of 161795738 is 837597161.

161795738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 98863249 + 62932489 = 9943^2 + 7933^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161795692 and 161795701.

It is not an unprimeable number, because it can be changed into a prime (161795737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28181 + ... + 33432.

Almost surely, 2^161795738 is an apocalyptic number.

161795738 is a deficient number, since it is larger than the sum of its proper divisors (102158638).

161795738 is a wasteful number, since it uses less digits than its factorization.

161795738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61729.

The product of its digits is 317520, while the sum is 47.

The square root of 161795738 is about 12719.8953612048. The cubic root of 161795738 is about 544.9069650131.

The spelling of 161795738 in words is "one hundred sixty-one million, seven hundred ninety-five thousand, seven hundred thirty-eight".