8865619395361 has 27 divisors (see below), whose sum is σ = 9240584679729. Its totient is φ = 8505580775400.

The previous prime is 8865619395313. The next prime is 8865619395401. The reversal of 8865619395361 is 1635939165688.

The square root of 8865619395361 is 2977519.

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

It is a de Polignac number, because none of the positive numbers 2^k-8865619395361 is a prime.

It is a super-2 number, since 2×8865619395361² (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 (8865619395161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12830129026 + ... + 12830129716.

It is an arithmetic number, because the mean of its divisors is an integer number (342243877027).

Almost surely, 2^{8865619395361} is an apocalyptic number.

8865619395361 is the 2977519-th square number.

8865619395361 is the 1488760-th centered octagonal number.

It is an amenable number.

8865619395361 is a deficient number, since it is larger than the sum of its proper divisors (374965284368).

8865619395361 is an frugal number, since it uses more digits than its factorization.

8865619395361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 861 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 70.

The spelling of 8865619395361 in words is "eight trillion, eight hundred sixty-five billion, six hundred nineteen million, three hundred ninety-five thousand, three hundred sixty-one".