161534310205 has 8 divisors (see below), whose sum is σ = 193912795872. Its totient is φ = 129179699088.

The previous prime is 161534310191. The next prime is 161534310277. The reversal of 161534310205 is 502013435161.

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 161534310205 - 2⁵ = 161534310173 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5953747 + ... + 5980816.

It is an arithmetic number, because the mean of its divisors is an integer number (24239099484).

Almost surely, 2^161534310205 is an apocalyptic number.

It is an amenable number.

161534310205 is a deficient number, since it is larger than the sum of its proper divisors (32378485667).

161534310205 is a wasteful number, since it uses less digits than its factorization.

161534310205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937275.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 161534310205 its reverse (502013435161), we get a palindrome (663547745366).

The spelling of 161534310205 in words is "one hundred sixty-one billion, five hundred thirty-four million, three hundred ten thousand, two hundred five".