8771231645 has 16 divisors (see below), whose sum is σ = 11497930560. Its totient is φ = 6370416000.

The previous prime is 8771231641. The next prime is 8771231669. The reversal of 8771231645 is 5461321778.

It is not a de Polignac number, because 8771231645 - 2² = 8771231641 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8771231596 and 8771231605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8771231641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67256 + ... + 148545.

It is an arithmetic number, because the mean of its divisors is an integer number (718620660).

Almost surely, 2^8771231645 is an apocalyptic number.

It is an amenable number.

8771231645 is a deficient number, since it is larger than the sum of its proper divisors (2726698915).

8771231645 is a wasteful number, since it uses less digits than its factorization.

8771231645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216556.

The product of its digits is 282240, while the sum is 44.

The square root of 8771231645 is about 93654.8538250955. The cubic root of 8771231645 is about 2062.3080020601.

The spelling of 8771231645 in words is "eight billion, seven hundred seventy-one million, two hundred thirty-one thousand, six hundred forty-five".