281473786945 has 16 divisors (see below), whose sum is σ = 385147843920. Its totient is φ = 195630649344.

The previous prime is 281473786921. The next prime is 281473786963. The reversal of 281473786945 is 549687374182.

It can be written as a sum of positive squares in 8 ways, for example, as 10800197776 + 270673589169 = 103924^2 + 520263^2 .

It is a de Polignac number, because none of the positive numbers 2^k-281473786945 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127362600 + ... + 127364809.

It is an arithmetic number, because the mean of its divisors is an integer number (24071740245).

Almost surely, 2^281473786945 is an apocalyptic number.

It is an amenable number.

281473786945 is a deficient number, since it is larger than the sum of its proper divisors (103674056975).

281473786945 is a wasteful number, since it uses less digits than its factorization.

281473786945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254727444.

The product of its digits is 81285120, while the sum is 64.

The spelling of 281473786945 in words is "two hundred eighty-one billion, four hundred seventy-three million, seven hundred eighty-six thousand, nine hundred forty-five".