81837250886 has 8 divisors (see below), whose sum is σ = 122793552840. Its totient is φ = 40906066608.

The previous prime is 81837250879. The next prime is 81837250907. The reversal of 81837250886 is 68805273818.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 6271271 + ... + 6284306.

It is an arithmetic number, because the mean of its divisors is an integer number (15349194105).

Almost surely, 2^81837250886 is an apocalyptic number.

81837250886 is a deficient number, since it is larger than the sum of its proper divisors (40956301954).

81837250886 is a wasteful number, since it uses less digits than its factorization.

81837250886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12558838.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 81837250886 in words is "eighty-one billion, eight hundred thirty-seven million, two hundred fifty thousand, eight hundred eighty-six".