8641980281 has 8 divisors (see below), whose sum is σ = 9428310144. Its totient is φ = 7855766320.

The previous prime is 8641980271. The next prime is 8641980283. The reversal of 8641980281 is 1820891468.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8641980281 is a prime.

It is a super-2 number, since 2×8641980281² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8641980283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219971 + ... + 256263.

It is an arithmetic number, because the mean of its divisors is an integer number (1178538768).

Almost surely, 2^8641980281 is an apocalyptic number.

It is an amenable number.

8641980281 is a deficient number, since it is larger than the sum of its proper divisors (786329863).

8641980281 is a wasteful number, since it uses less digits than its factorization.

8641980281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57951.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 8641980281 is about 92962.2519144195. The cubic root of 8641980281 is about 2052.1278940770.

The spelling of 8641980281 in words is "eight billion, six hundred forty-one million, nine hundred eighty thousand, two hundred eighty-one".