81845316350 has 48 divisors (see below), whose sum is σ = 178025831808. Its totient is φ = 27408659040.

The previous prime is 81845316337. The next prime is 81845316379. The reversal of 81845316350 is 5361354818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2704064 + ... + 2734163.

It is an arithmetic number, because the mean of its divisors is an integer number (3708871496).

Almost surely, 2^81845316350 is an apocalyptic number.

81845316350 is an abundant number, since it is smaller than the sum of its proper divisors (96180515458).

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

81845316350 is a wasteful number, since it uses less digits than its factorization.

81845316350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5438289 (or 5438284 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 81845316350 in words is "eighty-one billion, eight hundred forty-five million, three hundred sixteen thousand, three hundred fifty".