161353097243 has 4 divisors (see below), whose sum is σ = 173764873968. Its totient is φ = 148941320520.

The previous prime is 161353097167. The next prime is 161353097327. The reversal of 161353097243 is 342790353161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342790353161 = 41 ⋅8360740321.

It is a cyclic number.

It is not a de Polignac number, because 161353097243 - 2²⁴ = 161336320027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161353097194 and 161353097203.

It is not an unprimeable number, because it can be changed into a prime (161353027243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6205888343 + ... + 6205888368.

It is an arithmetic number, because the mean of its divisors is an integer number (43441218492).

Almost surely, 2^161353097243 is an apocalyptic number.

161353097243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161353097243 is a deficient number, since it is larger than the sum of its proper divisors (12411776725).

161353097243 is a wasteful number, since it uses less digits than its factorization.

161353097243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12411776724.

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 161353097243 in words is "one hundred sixty-one billion, three hundred fifty-three million, ninety-seven thousand, two hundred forty-three".