161129744 has 20 divisors (see below), whose sum is σ = 315283020. Its totient is φ = 79766400.

The previous prime is 161129741. The next prime is 161129777. The reversal of 161129744 is 447921161.

161129744 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 156550144 + 4579600 = 12512^2 + 2140^2 .

It is not an unprimeable number, because it can be changed into a prime (161129741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48239 + ... + 51470.

It is an arithmetic number, because the mean of its divisors is an integer number (15764151).

Almost surely, 2^161129744 is an apocalyptic number.

It is an amenable number.

161129744 is a deficient number, since it is larger than the sum of its proper divisors (154153276).

161129744 is a wasteful number, since it uses less digits than its factorization.

161129744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99818 (or 99812 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 161129744 is about 12693.6891406714. The cubic root of 161129744 is about 544.1582764653.

The spelling of 161129744 in words is "one hundred sixty-one million, one hundred twenty-nine thousand, seven hundred forty-four".