161051444 has 12 divisors (see below), whose sum is σ = 288714468. Its totient is φ = 78561600.

The previous prime is 161051431. The next prime is 161051461. The reversal of 161051444 is 444150161.

161051444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35880100 + 125171344 = 5990^2 + 11188^2 .

It is a super-2 number, since 2×161051444² = 51875135228970272, which contains 22 as substring.

It is a congruent number.

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, 490847 + ... + 491174.

It is an arithmetic number, because the mean of its divisors is an integer number (24059539).

Almost surely, 2^161051444 is an apocalyptic number.

It is an amenable number.

161051444 is a deficient number, since it is larger than the sum of its proper divisors (127663024).

161051444 is a wasteful number, since it uses less digits than its factorization.

161051444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982066 (or 982064 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 161051444 is about 12690.6045561273. The cubic root of 161051444 is about 544.0701187371.

The spelling of 161051444 in words is "one hundred sixty-one million, fifty-one thousand, four hundred forty-four".