81343360000 has 440 divisors, whose sum is σ = 236557477376. Its totient is φ = 27371520000.

The previous prime is 81343359973. The next prime is 81343360009. The reversal of 81343360000 is 6334318.

It is a super-4 number, since 4×81343360000⁴ (a number of 45 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81343360009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 300159865 + ... + 300160135.

Almost surely, 2^81343360000 is an apocalyptic number.

81343360000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81343360000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118278738688).

81343360000 is an abundant number, since it is smaller than the sum of its proper divisors (155214117376).

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

81343360000 is an equidigital number, since it uses as much as digits as its factorization.

81343360000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 81343360000 its reverse (6334318), we get a palindrome (81349694318).

The spelling of 81343360000 in words is "eighty-one billion, three hundred forty-three million, three hundred sixty thousand".