8655843881 has 2 divisors, whose sum is σ = 8655843882. Its totient is φ = 8655843880.

The previous prime is 8655843853. The next prime is 8655843907. The reversal of 8655843881 is 1883485568.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8048960656 + 606883225 = 89716^2 + 24635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8655843881 is a prime.

It is a super-2 number, since 2×8655843881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8655843841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4327921940 + 4327921941.

It is an arithmetic number, because the mean of its divisors is an integer number (4327921941).

Almost surely, 2^8655843881 is an apocalyptic number.

It is an amenable number.

8655843881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8655843881 is an equidigital number, since it uses as much as digits as its factorization.

8655843881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7372800, while the sum is 56.

The square root of 8655843881 is about 93036.7877831130. The cubic root of 8655843881 is about 2053.2246596965.

The spelling of 8655843881 in words is "eight billion, six hundred fifty-five million, eight hundred forty-three thousand, eight hundred eighty-one".