161261288 has 16 divisors (see below), whose sum is σ = 302576580. Its totient is φ = 80574208.

The previous prime is 161261273. The next prime is 161261293. The reversal of 161261288 is 882162161.

161261288 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 160224964 + 1036324 = 12658^2 + 1018^2 .

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, 6656 + ... + 19152.

Almost surely, 2^161261288 is an apocalyptic number.

It is an amenable number.

161261288 is a deficient number, since it is larger than the sum of its proper divisors (141315292).

161261288 is a wasteful number, since it uses less digits than its factorization.

161261288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14116 (or 14112 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 161261288 is about 12698.8695559880. The cubic root of 161261288 is about 544.3063171771.

The spelling of 161261288 in words is "one hundred sixty-one million, two hundred sixty-one thousand, two hundred eighty-eight".