161919841 has 8 divisors (see below), whose sum is σ = 165674880. Its totient is φ = 158177808.

The previous prime is 161919833. The next prime is 161919887. The reversal of 161919841 is 148919161.

161919841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161919841 - 2³ = 161919833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161919794 and 161919803.

It is not an unprimeable number, because it can be changed into a prime (161919941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24655 + ... + 30523.

It is an arithmetic number, because the mean of its divisors is an integer number (20709360).

Almost surely, 2^161919841 is an apocalyptic number.

It is an amenable number.

161919841 is a deficient number, since it is larger than the sum of its proper divisors (3755039).

161919841 is an equidigital number, since it uses as much as digits as its factorization.

161919841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6503.

The product of its digits is 15552, while the sum is 40.

The square root of 161919841 is about 12724.7727288152. The cubic root of 161919841 is about 545.0462503184.

The spelling of 161919841 in words is "one hundred sixty-one million, nine hundred nineteen thousand, eight hundred forty-one".