8561312620 has 48 divisors (see below), whose sum is σ = 20746672128. Its totient is φ = 2906804160.

The previous prime is 8561312593. The next prime is 8561312663. The reversal of 8561312620 is 262131658.

It is an unprimeable number.

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, 282436 + ... + 311275.

It is an arithmetic number, because the mean of its divisors is an integer number (432222336).

Almost surely, 2^8561312620 is an apocalyptic number.

It is an amenable number.

8561312620 is an abundant number, since it is smaller than the sum of its proper divisors (12185359508).

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

8561312620 is a wasteful number, since it uses less digits than its factorization.

8561312620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593830 (or 593828 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 8561312620 is about 92527.3614667575. The cubic root of 8561312620 is about 2045.7227989203.

The spelling of 8561312620 in words is "eight billion, five hundred sixty-one million, three hundred twelve thousand, six hundred twenty".