161213127671 has 4 divisors (see below), whose sum is σ = 161220199344. Its totient is φ = 161206056000.

The previous prime is 161213127611. The next prime is 161213127689. The reversal of 161213127671 is 176721312161.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161213127671 is a prime.

It is a super-2 number, since 2×161213127671² (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 (161213127611) 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, 3501530 + ... + 3547271.

It is an arithmetic number, because the mean of its divisors is an integer number (40305049836).

Almost surely, 2^161213127671 is an apocalyptic number.

161213127671 is a deficient number, since it is larger than the sum of its proper divisors (7071673).

161213127671 is an equidigital number, since it uses as much as digits as its factorization.

161213127671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071672.

The product of its digits is 21168, while the sum is 38.

The spelling of 161213127671 in words is "one hundred sixty-one billion, two hundred thirteen million, one hundred twenty-seven thousand, six hundred seventy-one".