281144913361 has 9 divisors (see below), whose sum is σ = 304442488731. Its totient is φ = 259512018792.

The previous prime is 281144913353. The next prime is 281144913373. The reversal of 281144913361 is 163319441182.

It is a happy number.

The square root of 281144913361 is 530231.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 41589484225 + 239555429136 = 203935^2 + 489444^2 .

It is not a de Polignac number, because 281144913361 - 2³ = 281144913353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281144913331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6872610 + ... + 6913396.

Almost surely, 2^281144913361 is an apocalyptic number.

281144913361 is the 530231-st square number.

281144913361 is the 265116-th centered octagonal number.

It is an amenable number.

281144913361 is a deficient number, since it is larger than the sum of its proper divisors (23297575370).

281144913361 is an frugal number, since it uses more digits than its factorization.

281144913361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81600 (or 40800 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The spelling of 281144913361 in words is "two hundred eighty-one billion, one hundred forty-four million, nine hundred thirteen thousand, three hundred sixty-one".