161650601 has 16 divisors (see below), whose sum is σ = 194704128. Its totient is φ = 131208000.

The previous prime is 161650561. The next prime is 161650607. The reversal of 161650601 is 106056161.

161650601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161650601 - 2¹⁸ = 161388457 is a prime.

It is a super-2 number, since 2×161650601² = 52261833607322402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161650607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11291 + ... + 21231.

It is an arithmetic number, because the mean of its divisors is an integer number (12169008).

Almost surely, 2^161650601 is an apocalyptic number.

It is an amenable number.

161650601 is a deficient number, since it is larger than the sum of its proper divisors (33053527).

161650601 is a wasteful number, since it uses less digits than its factorization.

161650601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 161650601 is about 12714.1889635163. The cubic root of 161650601 is about 544.7439821008.

The spelling of 161650601 in words is "one hundred sixty-one million, six hundred fifty thousand, six hundred one".