161943073237 has 8 divisors (see below), whose sum is σ = 176668208640. Its totient is φ = 147218444160.

The previous prime is 161943073231. The next prime is 161943073247. The reversal of 161943073237 is 732370349161.

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

It is a cyclic number.

It is not a de Polignac number, because 161943073237 - 2⁷ = 161943073109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161943073231) 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, 914508 + ... + 1077130.

It is an arithmetic number, because the mean of its divisors is an integer number (22083526080).

Almost surely, 2^161943073237 is an apocalyptic number.

It is an amenable number.

161943073237 is a deficient number, since it is larger than the sum of its proper divisors (14725135403).

161943073237 is a wasteful number, since it uses less digits than its factorization.

161943073237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253163.

The product of its (nonzero) digits is 571536, while the sum is 46.

The spelling of 161943073237 in words is "one hundred sixty-one billion, nine hundred forty-three million, seventy-three thousand, two hundred thirty-seven".