161642036 has 12 divisors (see below), whose sum is σ = 284215680. Its totient is φ = 80437560.

The previous prime is 161642021. The next prime is 161642051. The reversal of 161642036 is 630246161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161642021) and next prime (161642051).

It is a super-2 number, since 2×161642036² = 52256295604450592, which contains 22 as substring.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 94916 + ... + 96603.

It is an arithmetic number, because the mean of its divisors is an integer number (23684640).

Almost surely, 2^161642036 is an apocalyptic number.

It is an amenable number.

161642036 is a deficient number, since it is larger than the sum of its proper divisors (122573644).

161642036 is a wasteful number, since it uses less digits than its factorization.

161642036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191734 (or 191732 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 161642036 is about 12713.8521306487. The cubic root of 161642036 is about 544.7343609083.

Adding to 161642036 its reverse (630246161), we get a palindrome (791888197).

The spelling of 161642036 in words is "one hundred sixty-one million, six hundred forty-two thousand, thirty-six".