8631641881 has 8 divisors (see below), whose sum is σ = 8651966400. Its totient is φ = 8611340208.

The previous prime is 8631641807. The next prime is 8631641929. The reversal of 8631641881 is 1881461368.

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

It is a cyclic number.

It is not a de Polignac number, because 8631641881 - 2¹¹ = 8631639833 is a prime.

It is a super-2 number, since 2×8631641881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8631621881) 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, 918595 + ... + 927943.

It is an arithmetic number, because the mean of its divisors is an integer number (1081495800).

Almost surely, 2^8631641881 is an apocalyptic number.

It is an amenable number.

8631641881 is a deficient number, since it is larger than the sum of its proper divisors (20324519).

8631641881 is a wasteful number, since it uses less digits than its factorization.

8631641881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11423.

The product of its digits is 221184, while the sum is 46.

The square root of 8631641881 is about 92906.6299087423. The cubic root of 8631641881 is about 2051.3092474213.

The spelling of 8631641881 in words is "eight billion, six hundred thirty-one million, six hundred forty-one thousand, eight hundred eighty-one".