81342708230 has 384 divisors, whose sum is σ = 199986278400. Its totient is φ = 23572684800.

The previous prime is 81342708221. The next prime is 81342708259. The reversal of 81342708230 is 3280724318.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 289475690 + ... + 289475970.

It is an arithmetic number, because the mean of its divisors is an integer number (520797600).

Almost surely, 2^81342708230 is an apocalyptic number.

81342708230 is an abundant number, since it is smaller than the sum of its proper divisors (118643570170).

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

81342708230 is a wasteful number, since it uses less digits than its factorization.

81342708230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 81342708230 in words is "eighty-one billion, three hundred forty-two million, seven hundred eight thousand, two hundred thirty".