8668955487481 has 27 divisors (see below), whose sum is σ = 8970087771687. Its totient is φ = 8377854600960.

The previous prime is 8668955487463. The next prime is 8668955487497. The reversal of 8668955487481 is 1847845598668.

The square root of 8668955487481 is 2944309.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 7661220587881 + 1007734899600 = 2767891^2 + 1003860^2 .

It is not a de Polignac number, because 8668955487481 - 2³⁵ = 8634595749113 is a prime.

It is a super-2 number, since 2×8668955487481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8668955487781) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11391531141 + ... + 11391531901.

Almost surely, 2^{8668955487481} is an apocalyptic number.

8668955487481 is the 2944309-th square number.

8668955487481 is the 1472155-th centered octagonal number.

It is an amenable number.

8668955487481 is a deficient number, since it is larger than the sum of its proper divisors (301132284206).

8668955487481 is an frugal number, since it uses more digits than its factorization.

8668955487481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 887 counting only the distinct ones).

The product of its digits is 3715891200, while the sum is 79.

The spelling of 8668955487481 in words is "eight trillion, six hundred sixty-eight billion, nine hundred fifty-five million, four hundred eighty-seven thousand, four hundred eighty-one".