16161231820271 has 4 divisors (see below), whose sum is σ = 16161303973992. Its totient is φ = 16161159666552.

The previous prime is 16161231820229. The next prime is 16161231820297. The reversal of 16161231820271 is 17202813216161.

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 16161231820271 - 2¹⁸ = 16161231558127 is a prime.

It is a super-2 number, since 2×16161231820271² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161231828271) 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, 35739836 + ... + 36189201.

It is an arithmetic number, because the mean of its divisors is an integer number (4040325993498).

Almost surely, 2^{16161231820271} is an apocalyptic number.

16161231820271 is a deficient number, since it is larger than the sum of its proper divisors (72153721).

16161231820271 is an equidigital number, since it uses as much as digits as its factorization.

16161231820271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72153720.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 16161231820271 in words is "sixteen trillion, one hundred sixty-one billion, two hundred thirty-one million, eight hundred twenty thousand, two hundred seventy-one".