161016001 has 4 divisors (see below), whose sum is σ = 163283904. Its totient is φ = 158748100.

The previous prime is 161015989. The next prime is 161016017. The reversal of 161016001 is 100610161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100610161 = 109 ⋅923029.

It is a cyclic number.

It is not a de Polignac number, because 161016001 - 2⁵ = 161015969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161016301) 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, 1133845 + ... + 1133986.

It is an arithmetic number, because the mean of its divisors is an integer number (40820976).

Almost surely, 2^161016001 is an apocalyptic number.

It is an amenable number.

161016001 is a deficient number, since it is larger than the sum of its proper divisors (2267903).

161016001 is an equidigital number, since it uses as much as digits as its factorization.

161016001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267902.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 161016001 is about 12689.2080525145. The cubic root of 161016001 is about 544.0302041783.

Adding to 161016001 its reverse (100610161), we get a palindrome (261626162).

The spelling of 161016001 in words is "one hundred sixty-one million, sixteen thousand, one".