161650682 has 4 divisors (see below), whose sum is σ = 242476026. Its totient is φ = 80825340.

The previous prime is 161650679. The next prime is 161650691. The reversal of 161650682 is 286056161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 286056161 = 17 ⋅16826833.

It can be written as a sum of positive squares in only one way, i.e., 128346241 + 33304441 = 11329^2 + 5771^2 .

It is a super-2 number, since 2×161650682² = 52261885982130248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40412669 + ... + 40412672.

Almost surely, 2^161650682 is an apocalyptic number.

161650682 is a deficient number, since it is larger than the sum of its proper divisors (80825344).

161650682 is an equidigital number, since it uses as much as digits as its factorization.

161650682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80825343.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 161650682 is about 12714.1921489334. The cubic root of 161650682 is about 544.7440730876.

The spelling of 161650682 in words is "one hundred sixty-one million, six hundred fifty thousand, six hundred eighty-two".