161502040243 has 8 divisors (see below), whose sum is σ = 166041123776. Its totient is φ = 156998557800.

The previous prime is 161502040229. The next prime is 161502040247. The reversal of 161502040243 is 342040205161.

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 161502040243 - 2³³ = 152912105651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161502040247) 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, 8891073 + ... + 8909218.

It is an arithmetic number, because the mean of its divisors is an integer number (20755140472).

Almost surely, 2^161502040243 is an apocalyptic number.

161502040243 is a deficient number, since it is larger than the sum of its proper divisors (4539083533).

161502040243 is a wasteful number, since it uses less digits than its factorization.

161502040243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17800545.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 161502040243 in words is "one hundred sixty-one billion, five hundred two million, forty thousand, two hundred forty-three".