161038508 has 24 divisors (see below), whose sum is σ = 295656480. Its totient is φ = 76643840.

The previous prime is 161038489. The next prime is 161038517. The reversal of 161038508 is 805830161.

It is a super-3 number, since 3×161038508³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541 + ... + 18012.

It is an arithmetic number, because the mean of its divisors is an integer number (12319020).

Almost surely, 2^161038508 is an apocalyptic number.

It is an amenable number.

161038508 is a deficient number, since it is larger than the sum of its proper divisors (134617972).

161038508 is a wasteful number, since it uses less digits than its factorization.

161038508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19657 (or 19655 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 161038508 is about 12690.0948775019. The cubic root of 161038508 is about 544.0555513845.

Adding to 161038508 its reverse (805830161), we get a palindrome (966868669).

The spelling of 161038508 in words is "one hundred sixty-one million, thirty-eight thousand, five hundred eight".