81300085340 has 96 divisors (see below), whose sum is σ = 181803363840. Its totient is φ = 30451680000.

The previous prime is 81300085333. The next prime is 81300085357. The reversal of 81300085340 is 4358000318.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81300085297 and 81300085306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28514915 + ... + 28517765.

It is an arithmetic number, because the mean of its divisors is an integer number (1893785040).

Almost surely, 2^81300085340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81300085340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90901681920).

81300085340 is an abundant number, since it is smaller than the sum of its proper divisors (100503278500).

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

81300085340 is a wasteful number, since it uses less digits than its factorization.

81300085340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723 (or 3721 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 81300085340 its reverse (4358000318), we get a palindrome (85658085658).

The spelling of 81300085340 in words is "eighty-one billion, three hundred million, eighty-five thousand, three hundred forty".