161333871023 has 16 divisors (see below), whose sum is σ = 175115673600. Its totient is φ = 147752125920.

The previous prime is 161333870969. The next prime is 161333871029. The reversal of 161333871023 is 320178333161.

It is a happy number.

161333871023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161333871023 - 2¹² = 161333866927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161333871029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855338 + ... + 1026776.

It is an arithmetic number, because the mean of its divisors is an integer number (10944729600).

Almost surely, 2^161333871023 is an apocalyptic number.

161333871023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161333871023 is a deficient number, since it is larger than the sum of its proper divisors (13781802577).

161333871023 is a wasteful number, since it uses less digits than its factorization.

161333871023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172022.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 161333871023 in words is "one hundred sixty-one billion, three hundred thirty-three million, eight hundred seventy-one thousand, twenty-three".