161252944 has 10 divisors (see below), whose sum is σ = 312427610. Its totient is φ = 80626464.

The previous prime is 161252909. The next prime is 161252947. The reversal of 161252944 is 449252161.

It can be written as a sum of positive squares in only one way, i.e., 159062544 + 2190400 = 12612^2 + 1480^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161252947) 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 as a sum of consecutive naturals, namely, 5039139 + ... + 5039170.

It is an arithmetic number, because the mean of its divisors is an integer number (31242761).

Almost surely, 2^161252944 is an apocalyptic number.

It is an amenable number.

161252944 is a deficient number, since it is larger than the sum of its proper divisors (151174666).

161252944 is a wasteful number, since it uses less digits than its factorization.

161252944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078317 (or 10078311 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 161252944 is about 12698.5410185580. The cubic root of 161252944 is about 544.2969291619.

The spelling of 161252944 in words is "one hundred sixty-one million, two hundred fifty-two thousand, nine hundred forty-four".