8645781970 has 96 divisors (see below), whose sum is σ = 19262862720. Its totient is φ = 2776112640.

The previous prime is 8645781959. The next prime is 8645781979. The reversal of 8645781970 is 791875468.

It is not an unprimeable number, because it can be changed into a prime (8645781979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1755171 + ... + 1760089.

It is an arithmetic number, because the mean of its divisors is an integer number (200654820).

Almost surely, 2^8645781970 is an apocalyptic number.

8645781970 is an abundant number, since it is smaller than the sum of its proper divisors (10617080750).

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

8645781970 is a wasteful number, since it uses less digits than its factorization.

8645781970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168 (or 5161 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The square root of 8645781970 is about 92982.6971538253. The cubic root of 8645781970 is about 2052.4287667966.

The spelling of 8645781970 in words is "eight billion, six hundred forty-five million, seven hundred eighty-one thousand, nine hundred seventy".