8865481961 has 4 divisors (see below), whose sum is σ = 10131979392. Its totient is φ = 7598984532.

The previous prime is 8865481931. The next prime is 8865481987. The reversal of 8865481961 is 1691845688.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8865481961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8865481897 and 8865481906.

It is not an unprimeable number, because it can be changed into a prime (8865481921) 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 3 ways as a sum of consecutive naturals, for example, 633248705 + ... + 633248718.

It is an arithmetic number, because the mean of its divisors is an integer number (2532994848).

Almost surely, 2^8865481961 is an apocalyptic number.

It is an amenable number.

8865481961 is a deficient number, since it is larger than the sum of its proper divisors (1266497431).

8865481961 is a wasteful number, since it uses less digits than its factorization.

8865481961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266497430.

The product of its digits is 3317760, while the sum is 56.

The square root of 8865481961 is about 94156.6883497928. The cubic root of 8865481961 is about 2069.6684697800.

The spelling of 8865481961 in words is "eight billion, eight hundred sixty-five million, four hundred eighty-one thousand, nine hundred sixty-one".