161266020044 has 12 divisors (see below), whose sum is σ = 282769989600. Its totient is φ = 80474594448.

The previous prime is 161266020043. The next prime is 161266020077. The reversal of 161266020044 is 440020662161.

It is not an unprimeable number, because it can be changed into a prime (161266020043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39601604 + ... + 39605675.

It is an arithmetic number, because the mean of its divisors is an integer number (23564165800).

Almost surely, 2^161266020044 is an apocalyptic number.

It is an amenable number.

161266020044 is a deficient number, since it is larger than the sum of its proper divisors (121503969556).

161266020044 is a wasteful number, since it uses less digits than its factorization.

161266020044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79207792 (or 79207790 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 161266020044 in words is "one hundred sixty-one billion, two hundred sixty-six million, twenty thousand, forty-four".