281874320641 has 8 divisors (see below), whose sum is σ = 284351288040. Its totient is φ = 279403433088.

The previous prime is 281874320617. The next prime is 281874320687. The reversal of 281874320641 is 146023478182.

It can be written as a sum of positive squares in 4 ways, for example, as 64442361025 + 217431959616 = 253855^2 + 466296^2 .

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 281874320641 - 2¹³ = 281874312449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281874320591 and 281874320600.

It is not an unprimeable number, because it can be changed into a prime (281874320141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426806 + ... + 1612303.

It is an arithmetic number, because the mean of its divisors is an integer number (35543911005).

Almost surely, 2^281874320641 is an apocalyptic number.

It is an amenable number.

281874320641 is a deficient number, since it is larger than the sum of its proper divisors (2476967399).

281874320641 is a wasteful number, since it uses less digits than its factorization.

281874320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039923.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 281874320641 in words is "two hundred eighty-one billion, eight hundred seventy-four million, three hundred twenty thousand, six hundred forty-one".