281945968818 has 16 divisors (see below), whose sum is σ = 563898541536. Its totient is φ = 93980888960.

The previous prime is 281945968757. The next prime is 281945968831. The reversal of 281945968818 is 818869549182.

It is a super-3 number, since 3×281945968818³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411778 + ... + 856418.

It is an arithmetic number, because the mean of its divisors is an integer number (35243658846).

Almost surely, 2^281945968818 is an apocalyptic number.

281945968818 is an abundant number, since it is smaller than the sum of its proper divisors (281952572718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281945968818 is a wasteful number, since it uses less digits than its factorization.

281945968818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550329.

The product of its digits is 79626240, while the sum is 69.

The spelling of 281945968818 in words is "two hundred eighty-one billion, nine hundred forty-five million, nine hundred sixty-eight thousand, eight hundred eighteen".