840436161 has 8 divisors (see below), whose sum is σ = 1146641760. Its totient is φ = 547260672.

The previous prime is 840436127. The next prime is 840436189. The reversal of 840436161 is 161634048.

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

It is not a de Polignac number, because 840436161 - 2²³ = 832047553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840436111) 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, 3257376 + ... + 3257633.

It is an arithmetic number, because the mean of its divisors is an integer number (143330220).

Almost surely, 2^840436161 is an apocalyptic number.

It is an amenable number.

840436161 is a deficient number, since it is larger than the sum of its proper divisors (306205599).

840436161 is a wasteful number, since it uses less digits than its factorization.

840436161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515055.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 840436161 is about 28990.2770079901. The cubic root of 840436161 is about 943.7020752764.

The spelling of 840436161 in words is "eight hundred forty million, four hundred thirty-six thousand, one hundred sixty-one".