161142355443 has 8 divisors (see below), whose sum is σ = 214907128768. Its totient is φ = 107402909544.

The previous prime is 161142355421. The next prime is 161142355523. The reversal of 161142355443 is 344553241161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161142355443 - 2⁶ = 161142355379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161142355403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6317005 + ... + 6342462.

It is an arithmetic number, because the mean of its divisors is an integer number (26863391096).

Almost surely, 2^161142355443 is an apocalyptic number.

161142355443 is a deficient number, since it is larger than the sum of its proper divisors (53764773325).

161142355443 is a wasteful number, since it uses less digits than its factorization.

161142355443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663713.

The product of its digits is 172800, while the sum is 39.

The spelling of 161142355443 in words is "one hundred sixty-one billion, one hundred forty-two million, three hundred fifty-five thousand, four hundred forty-three".