161235005164 has 12 divisors (see below), whose sum is σ = 282381191064.
Its totient is φ = 80554664864.
The previous prime is 161235005137. The next prime is 161235005171. The reversal of 161235005164 is 461500532161.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15703657 + ... + 15713920.
It is an arithmetic number, because the mean of its divisors is an integer number (23531765922).
Almost surely, 2161235005164 is an apocalyptic number.
It is an amenable number.
161235005164 is a deficient number, since it is larger than the sum of its proper divisors (121146185900).
161235005164 is a wasteful number, since it uses less digits than its factorization.
161235005164 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 31418864 (or 31418862 counting only the distinct ones).
The product of its (nonzero) digits is 21600, while the sum is 34.
The spelling of 161235005164 in words is "one hundred sixty-one billion, two hundred thirty-five million, five thousand, one hundred sixty-four".