891086912676 has 81 divisors (see below), whose sum is σ = 2339385780459. Its totient is φ = 296977996296.

The previous prime is 891086912671. The next prime is 891086912693. The reversal of 891086912676 is 676219680198.

The square root of 891086912676 is 943974.

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

It is a tau number, because it is divible by the number of its divisors (81).

It is not an unprimeable number, because it can be changed into a prime (891086912671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 152920875 + ... + 152926701.

Almost surely, 2^891086912676 is an apocalyptic number.

891086912676 is the 943974-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891086912676

891086912676 is an abundant number, since it is smaller than the sum of its proper divisors (1448298867783).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

891086912676 is an frugal number, since it uses more digits than its factorization.

891086912676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11682 (or 5832 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 891086912676 in words is "eight hundred ninety-one billion, eighty-six million, nine hundred twelve thousand, six hundred seventy-six".