409161339971 has 4 divisors (see below), whose sum is σ = 426950963472. Its totient is φ = 391371716472.

The previous prime is 409161339953. The next prime is 409161340001. The reversal of 409161339971 is 179933161904.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409161339971 - 2¹⁸ = 409161077827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409161339911) 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, 8894811716 + ... + 8894811761.

It is an arithmetic number, because the mean of its divisors is an integer number (106737740868).

Almost surely, 2^409161339971 is an apocalyptic number.

409161339971 is a deficient number, since it is larger than the sum of its proper divisors (17789623501).

409161339971 is a wasteful number, since it uses less digits than its factorization.

409161339971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17789623500.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 409161339971 in words is "four hundred nine billion, one hundred sixty-one million, three hundred thirty-nine thousand, nine hundred seventy-one".