281146818089 has 4 divisors (see below), whose sum is σ = 281148147456. Its totient is φ = 281145488724.

The previous prime is 281146818059. The next prime is 281146818101. The reversal of 281146818089 is 980818641182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980818641182 = 2 ⋅490409320591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281146818089 is a prime.

It is a super-2 number, since 2×281146818089² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281146818059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268889 + ... + 796614.

It is an arithmetic number, because the mean of its divisors is an integer number (70287036864).

Almost surely, 2^281146818089 is an apocalyptic number.

It is an amenable number.

281146818089 is a deficient number, since it is larger than the sum of its proper divisors (1329367).

281146818089 is a wasteful number, since it uses less digits than its factorization.

281146818089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329366.

The product of its (nonzero) digits is 1769472, while the sum is 56.

The spelling of 281146818089 in words is "two hundred eighty-one billion, one hundred forty-six million, eight hundred eighteen thousand, eighty-nine".