81875333206 has 16 divisors (see below), whose sum is σ = 124169718528. Its totient is φ = 40487905600.

The previous prime is 81875333161. The next prime is 81875333209. The reversal of 81875333206 is 60233357818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81875333209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553375 + ... + 685546.

It is an arithmetic number, because the mean of its divisors is an integer number (7760607408).

Almost surely, 2^81875333206 is an apocalyptic number.

81875333206 is a deficient number, since it is larger than the sum of its proper divisors (42294385322).

81875333206 is a wasteful number, since it uses less digits than its factorization.

81875333206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239287.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 81875333206 in words is "eighty-one billion, eight hundred seventy-five million, three hundred thirty-three thousand, two hundred six".