281662131061 has 8 divisors (see below), whose sum is σ = 285536849624. Its totient is φ = 277787854080.

The previous prime is 281662131017. The next prime is 281662131083. The reversal of 281662131061 is 160131266182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61777102500 + 219885028561 = 248550^2 + 468919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281662131061 - 2⁷ = 281662130933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 281662131061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281668131061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1296505 + ... + 1498081.

It is an arithmetic number, because the mean of its divisors is an integer number (35692106203).

Almost surely, 2^281662131061 is an apocalyptic number.

It is an amenable number.

281662131061 is a deficient number, since it is larger than the sum of its proper divisors (3874718563).

281662131061 is a wasteful number, since it uses less digits than its factorization.

281662131061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220791.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 281662131061 in words is "two hundred eighty-one billion, six hundred sixty-two million, one hundred thirty-one thousand, sixty-one".