8970781636 has 6 divisors (see below), whose sum is σ = 15698867870. Its totient is φ = 4485390816.

The previous prime is 8970781607. The next prime is 8970781639. The reversal of 8970781636 is 6361870798.

It can be written as a sum of positive squares in only one way, i.e., 5133722500 + 3837059136 = 71650^2 + 61944^2 .

It is not an unprimeable number, because it can be changed into a prime (8970781639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121347701 + ... + 1121347708.

Almost surely, 2^8970781636 is an apocalyptic number.

It is an amenable number.

8970781636 is a deficient number, since it is larger than the sum of its proper divisors (6728086234).

8970781636 is a wasteful number, since it uses less digits than its factorization.

8970781636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242695413 (or 2242695411 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 8970781636 is about 94714.2103171430. The cubic root of 8970781636 is about 2077.8303958175.

The spelling of 8970781636 in words is "eight billion, nine hundred seventy million, seven hundred eighty-one thousand, six hundred thirty-six".