161205280112685 has 64 divisors (see below), whose sum is σ = 269045668627200. Its totient is φ = 82351358318592.

The previous prime is 161205280112659. The next prime is 161205280112777. The reversal of 161205280112685 is 586211082502161.

It is not a de Polignac number, because 161205280112685 - 2³⁰ = 161204206370861 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4185702 + ... + 18437208.

It is an arithmetic number, because the mean of its divisors is an integer number (4203838572300).

Almost surely, 2^{161205280112685} is an apocalyptic number.

161205280112685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161205280112685 is a deficient number, since it is larger than the sum of its proper divisors (107840388514515).

161205280112685 is a wasteful number, since it uses less digits than its factorization.

161205280112685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14251870.

The product of its (nonzero) digits is 460800, while the sum is 48.

The spelling of 161205280112685 in words is "one hundred sixty-one trillion, two hundred five billion, two hundred eighty million, one hundred twelve thousand, six hundred eighty-five".