101644161 has 4 divisors (see below), whose sum is σ = 135525552. Its totient is φ = 67762772.

The previous prime is 101644111. The next prime is 101644177. The reversal of 101644161 is 161446101.

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: 161446101 = 3 ⋅53815367.

It is a cyclic number.

It is not a de Polignac number, because 101644161 - 2¹⁰ = 101643137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101644111) 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, 16940691 + ... + 16940696.

It is an arithmetic number, because the mean of its divisors is an integer number (33881388).

Almost surely, 2^101644161 is an apocalyptic number.

It is an amenable number.

101644161 is a deficient number, since it is larger than the sum of its proper divisors (33881391).

101644161 is an equidigital number, since it uses as much as digits as its factorization.

101644161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33881390.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 101644161 is about 10081.8728914820. The cubic root of 101644161 is about 466.6889075001.

The spelling of 101644161 in words is "one hundred one million, six hundred forty-four thousand, one hundred sixty-one".