161933950664205 has 16 divisors (see below), whose sum is σ = 259095665571840. Its totient is φ = 86364325517888.

The previous prime is 161933950664197. The next prime is 161933950664207. The reversal of 161933950664205 is 502466059339161.

It is a cyclic number.

It is not a de Polignac number, because 161933950664205 - 2³ = 161933950664197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161933950664207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25013325 + ... + 30814514.

It is an arithmetic number, because the mean of its divisors is an integer number (16193479098240).

Almost surely, 2^{161933950664205} is an apocalyptic number.

161933950664205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161933950664205 is a deficient number, since it is larger than the sum of its proper divisors (97161714907635).

161933950664205 is a wasteful number, since it uses less digits than its factorization.

161933950664205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56021220.

The product of its (nonzero) digits is 31492800, while the sum is 60.

The spelling of 161933950664205 in words is "one hundred sixty-one trillion, nine hundred thirty-three billion, nine hundred fifty million, six hundred sixty-four thousand, two hundred five".