161353508 has 6 divisors (see below), whose sum is σ = 282368646. Its totient is φ = 80676752.

The previous prime is 161353499. The next prime is 161353589. The reversal of 161353508 is 805353161.

It can be written as a sum of positive squares in only one way, i.e., 156300004 + 5053504 = 12502^2 + 2248^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20169185 + ... + 20169192.

It is an arithmetic number, because the mean of its divisors is an integer number (47061441).

Almost surely, 2^161353508 is an apocalyptic number.

It is an amenable number.

161353508 is a deficient number, since it is larger than the sum of its proper divisors (121015138).

161353508 is a wasteful number, since it uses less digits than its factorization.

161353508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40338381 (or 40338379 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 161353508 is about 12702.5000688841. The cubic root of 161353508 is about 544.4100543351.

The spelling of 161353508 in words is "one hundred sixty-one million, three hundred fifty-three thousand, five hundred eight".