8271220964 has 12 divisors (see below), whose sum is σ = 14973762300. Its totient is φ = 3993003168.

The previous prime is 8271220957. The next prime is 8271220967. The reversal of 8271220964 is 4690221728.

It can be written as a sum of positive squares in 2 ways, for example, as 3157540864 + 5113680100 = 56192^2 + 71510^2 .

It is not an unprimeable number, because it can be changed into a prime (8271220967) 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, 35651699 + ... + 35651930.

It is an arithmetic number, because the mean of its divisors is an integer number (1247813525).

Almost surely, 2^8271220964 is an apocalyptic number.

It is an amenable number.

8271220964 is a deficient number, since it is larger than the sum of its proper divisors (6702541336).

8271220964 is a wasteful number, since it uses less digits than its factorization.

8271220964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71303662 (or 71303660 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 8271220964 is about 90946.2531608642. The cubic root of 8271220964 is about 2022.3510321904.

The spelling of 8271220964 in words is "eight billion, two hundred seventy-one million, two hundred twenty thousand, nine hundred sixty-four".