161701996 has 12 divisors (see below), whose sum is σ = 288999648. Its totient is φ = 79130672.

The previous prime is 161701987. The next prime is 161701997. The reversal of 161701996 is 699107161.

It is a super-2 number, since 2×161701996² = 52295071020768032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161701997) 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, 429871 + ... + 430246.

It is an arithmetic number, because the mean of its divisors is an integer number (24083304).

Almost surely, 2^161701996 is an apocalyptic number.

It is an amenable number.

161701996 is a deficient number, since it is larger than the sum of its proper divisors (127297652).

161701996 is a wasteful number, since it uses less digits than its factorization.

161701996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860168 (or 860166 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 161701996 is about 12716.2099699557. The cubic root of 161701996 is about 544.8017077349.

The spelling of 161701996 in words is "one hundred sixty-one million, seven hundred one thousand, nine hundred ninety-six".