81430114388 has 96 divisors (see below), whose sum is σ = 173031925248. Its totient is φ = 32776128000.

The previous prime is 81430114343. The next prime is 81430114397. The reversal of 81430114388 is 88341103418.

It is a super-2 number, since 2×81430114388² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 27536606 + ... + 27539562.

It is an arithmetic number, because the mean of its divisors is an integer number (1802415888).

Almost surely, 2^81430114388 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 81430114388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86515962624).

81430114388 is an abundant number, since it is smaller than the sum of its proper divisors (91601810860).

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

81430114388 is a wasteful number, since it uses less digits than its factorization.

81430114388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753 (or 3751 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 81430114388 in words is "eighty-one billion, four hundred thirty million, one hundred fourteen thousand, three hundred eighty-eight".