891342311808 has 64 divisors (see below), whose sum is σ = 2549753262000. Its totient is φ = 274259171328.

The previous prime is 891342311791. The next prime is 891342311809. The reversal of 891342311808 is 808113243198.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×891342311808² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891342311809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89272083 + ... + 89282066.

Almost surely, 2^891342311808 is an apocalyptic number.

It is an amenable number.

891342311808 is an abundant number, since it is smaller than the sum of its proper divisors (1658410950192).

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

891342311808 is a wasteful number, since it uses less digits than its factorization.

891342311808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178554179 (or 178554167 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 891342311808 in words is "eight hundred ninety-one billion, three hundred forty-two million, three hundred eleven thousand, eight hundred eight".