161238192243 has 8 divisors (see below), whose sum is σ = 219983890368. Its totient is φ = 104992311144.

The previous prime is 161238192229. The next prime is 161238192253. The reversal of 161238192243 is 342291832161.

It is a happy number.

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

It is not a de Polignac number, because 161238192243 - 2⁸ = 161238191987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161238192195 and 161238192204.

It is not an unprimeable number, because it can be changed into a prime (161238192253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624954105 + ... + 624954362.

It is an arithmetic number, because the mean of its divisors is an integer number (27497986296).

Almost surely, 2^161238192243 is an apocalyptic number.

161238192243 is a deficient number, since it is larger than the sum of its proper divisors (58745698125).

161238192243 is a wasteful number, since it uses less digits than its factorization.

161238192243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249908513.

The product of its digits is 124416, while the sum is 42.

The spelling of 161238192243 in words is "one hundred sixty-one billion, two hundred thirty-eight million, one hundred ninety-two thousand, two hundred forty-three".