886521981681361 has 27 divisors (see below), whose sum is σ = 898585271294121. Its totient is φ = 874619826132744.

The previous prime is 886521981681331. The next prime is 886521981681407. The reversal of 886521981681361 is 163186189125688.

It is a happy number.

The square root of 886521981681361 is 29774519.

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

It is not a de Polignac number, because 886521981681361 - 2¹³ = 886521981673169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (886521981681331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1432184138110 + ... + 1432184138728.

Almost surely, 2^{886521981681361} is an apocalyptic number.

886521981681361 is the 29774519-th square number.

886521981681361 is the 14887260-th centered octagonal number.

It is an amenable number.

886521981681361 is a deficient number, since it is larger than the sum of its proper divisors (12063289612760).

886521981681361 is an frugal number, since it uses more digits than its factorization.

886521981681361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 1189 counting only the distinct ones).

The product of its digits is 238878720, while the sum is 73.

The spelling of 886521981681361 in words is "eight hundred eighty-six trillion, five hundred twenty-one billion, nine hundred eighty-one million, six hundred eighty-one thousand, three hundred sixty-one".