161043723115 has 32 divisors (see below), whose sum is σ = 222458918400. Its totient is φ = 110771569920.

The previous prime is 161043723103. The next prime is 161043723133. The reversal of 161043723115 is 511327340161.

It is not a de Polignac number, because 161043723115 - 2¹⁷ = 161043592043 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 602625 + ... + 827794.

It is an arithmetic number, because the mean of its divisors is an integer number (6951841200).

Almost surely, 2^161043723115 is an apocalyptic number.

161043723115 is a deficient number, since it is larger than the sum of its proper divisors (61415195285).

161043723115 is a wasteful number, since it uses less digits than its factorization.

161043723115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430547.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 161043723115 in words is "one hundred sixty-one billion, forty-three million, seven hundred twenty-three thousand, one hundred fifteen".