81483400000 has 336 divisors, whose sum is σ = 218346649920. Its totient is φ = 30067200000.

The previous prime is 81483399989. The next prime is 81483400003. The reversal of 81483400000 is 438418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81483400003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155799739 + ... + 155800261.

It is an arithmetic number, because the mean of its divisors is an integer number (649841220).

Almost surely, 2^81483400000 is an apocalyptic number.

81483400000 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 81483400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109173324960).

81483400000 is an abundant number, since it is smaller than the sum of its proper divisors (136863249920).

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

81483400000 is an equidigital number, since it uses as much as digits as its factorization.

81483400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 81483400000 its reverse (438418), we get a palindrome (81483838418).

The spelling of 81483400000 in words is "eighty-one billion, four hundred eighty-three million, four hundred thousand".