161831455345 has 8 divisors (see below), whose sum is σ = 221940281664. Its totient is φ = 110970140784.

The previous prime is 161831455327. The next prime is 161831455367. The reversal of 161831455345 is 543554138161.

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 161831455345 - 2³⁷ = 24392501873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161831455295 and 161831455304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2311877899 + ... + 2311877968.

It is an arithmetic number, because the mean of its divisors is an integer number (27742535208).

Almost surely, 2^161831455345 is an apocalyptic number.

It is an amenable number.

161831455345 is a deficient number, since it is larger than the sum of its proper divisors (60108826319).

161831455345 is an equidigital number, since it uses as much as digits as its factorization.

161831455345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623755879.

The product of its digits is 864000, while the sum is 46.

The spelling of 161831455345 in words is "one hundred sixty-one billion, eight hundred thirty-one million, four hundred fifty-five thousand, three hundred forty-five".