161271353719 has 4 divisors (see below), whose sum is σ = 184310118544. Its totient is φ = 138232588896.

The previous prime is 161271353713. The next prime is 161271353729. The reversal of 161271353719 is 917353172161.

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 161271353719 - 2¹¹ = 161271351671 is a prime.

It is a super-2 number, since 2×161271353719² (a number of 23 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 (161271353713) 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, 11519382402 + ... + 11519382415.

It is an arithmetic number, because the mean of its divisors is an integer number (46077529636).

Almost surely, 2^161271353719 is an apocalyptic number.

161271353719 is a deficient number, since it is larger than the sum of its proper divisors (23038764825).

161271353719 is an equidigital number, since it uses as much as digits as its factorization.

161271353719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23038764824.

The product of its digits is 238140, while the sum is 46.

The spelling of 161271353719 in words is "one hundred sixty-one billion, two hundred seventy-one million, three hundred fifty-three thousand, seven hundred nineteen".