161600836 has 12 divisors (see below), whose sum is σ = 285717628. Its totient is φ = 79967232.

The previous prime is 161600821. The next prime is 161600839. The reversal of 161600836 is 638006161.

It can be written as a sum of positive squares in 2 ways, for example, as 52272900 + 109327936 = 7230^2 + 10456^2 .

It is a super-2 number, since 2×161600836² = 52229660391797792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161600798 and 161600807.

It is not an unprimeable number, because it can be changed into a prime (161600839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207861 + ... + 208636.

Almost surely, 2^161600836 is an apocalyptic number.

It is an amenable number.

161600836 is a deficient number, since it is larger than the sum of its proper divisors (124116792).

161600836 is a wasteful number, since it uses less digits than its factorization.

161600836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416598 (or 416596 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 161600836 is about 12712.2317474156. The cubic root of 161600836 is about 544.6880755829.

Adding to 161600836 its reverse (638006161), we get a palindrome (799606997).

The spelling of 161600836 in words is "one hundred sixty-one million, six hundred thousand, eight hundred thirty-six".