161411641 has 4 divisors (see below), whose sum is σ = 161630800. Its totient is φ = 161192484.

The previous prime is 161411633. The next prime is 161411671. The reversal of 161411641 is 146114161.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 161411641 - 2³ = 161411633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161411611) 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, 108471 + ... + 109948.

It is an arithmetic number, because the mean of its divisors is an integer number (40407700).

Almost surely, 2^161411641 is an apocalyptic number.

It is an amenable number.

161411641 is a deficient number, since it is larger than the sum of its proper divisors (219159).

161411641 is an equidigital number, since it uses as much as digits as its factorization.

161411641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219158.

The product of its digits is 576, while the sum is 25.

The square root of 161411641 is about 12704.7881131485. The cubic root of 161411641 is about 544.4754271307.

The spelling of 161411641 in words is "one hundred sixty-one million, four hundred eleven thousand, six hundred forty-one".