81850293160 has 32 divisors (see below), whose sum is σ = 184190889600. Its totient is φ = 32735187520.

The previous prime is 81850293149. The next prime is 81850293197. The reversal of 81850293160 is 6139205818.

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 7 ways as a sum of consecutive naturals, for example, 120981 + ... + 422299.

It is an arithmetic number, because the mean of its divisors is an integer number (5755965300).

Almost surely, 2^81850293160 is an apocalyptic number.

It is an amenable number.

81850293160 is an abundant number, since it is smaller than the sum of its proper divisors (102340596440).

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

81850293160 is a wasteful number, since it uses less digits than its factorization.

81850293160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308121 (or 308117 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

Adding to 81850293160 its reverse (6139205818), we get a palindrome (87989498978).

The spelling of 81850293160 in words is "eighty-one billion, eight hundred fifty million, two hundred ninety-three thousand, one hundred sixty".