8281969945 has 24 divisors (see below), whose sum is σ = 10498994496. Its totient is φ = 6270862752.

The previous prime is 8281969931. The next prime is 8281969961. The reversal of 8281969945 is 5499691828.

It is not a de Polignac number, because 8281969945 - 2¹⁹ = 8281445657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3108684 + ... + 3111346.

It is an arithmetic number, because the mean of its divisors is an integer number (437458104).

Almost surely, 2^8281969945 is an apocalyptic number.

It is an amenable number.

8281969945 is a deficient number, since it is larger than the sum of its proper divisors (2217024551).

8281969945 is a wasteful number, since it uses less digits than its factorization.

8281969945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4429 (or 4410 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 61.

The square root of 8281969945 is about 91005.3292120852. The cubic root of 8281969945 is about 2023.2267111652.

The spelling of 8281969945 in words is "eight billion, two hundred eighty-one million, nine hundred sixty-nine thousand, nine hundred forty-five".