161661612343 has 12 divisors (see below), whose sum is σ = 203079051280. Its totient is φ = 125970086880.

The previous prime is 161661612341. The next prime is 161661612373. The reversal of 161661612343 is 343216166161.

161661612343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161661612343 - 2¹ = 161661612341 is a prime.

It is a super-2 number, since 2×161661612343² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161661612296 and 161661612305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161661612341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95431038 + ... + 95432731.

Almost surely, 2^161661612343 is an apocalyptic number.

161661612343 is a deficient number, since it is larger than the sum of its proper divisors (41417438937).

161661612343 is a wasteful number, since it uses less digits than its factorization.

161661612343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190863798 (or 190863787 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The spelling of 161661612343 in words is "one hundred sixty-one billion, six hundred sixty-one million, six hundred twelve thousand, three hundred forty-three".