891869340944 has 20 divisors (see below), whose sum is σ = 1728640026624. Its totient is φ = 445768688928.

The previous prime is 891869340931. The next prime is 891869340949. The reversal of 891869340944 is 449043968198.

It is a super-2 number, since 2×891869340944² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (891869340949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10329512 + ... + 10415495.

Almost surely, 2^891869340944 is an apocalyptic number.

It is an amenable number.

891869340944 is a deficient number, since it is larger than the sum of its proper divisors (836770685680).

891869340944 is a wasteful number, since it uses less digits than its factorization.

891869340944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20747702 (or 20747696 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 65.

The spelling of 891869340944 in words is "eight hundred ninety-one billion, eight hundred sixty-nine million, three hundred forty thousand, nine hundred forty-four".