81108242862 has 8 divisors (see below), whose sum is σ = 162216485736. Its totient is φ = 27036080952.

The previous prime is 81108242837. The next prime is 81108242909. The reversal of 81108242862 is 26824280118.

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

81108242862 is an admirable number.

It is a super-2 number, since 2×81108242862² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6759020233 + ... + 6759020244.

It is an arithmetic number, because the mean of its divisors is an integer number (20277060717).

Almost surely, 2^81108242862 is an apocalyptic number.

81108242862 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81108242862 is a wasteful number, since it uses less digits than its factorization.

81108242862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13518040482.

The product of its (nonzero) digits is 98304, while the sum is 42.

The spelling of 81108242862 in words is "eighty-one billion, one hundred eight million, two hundred forty-two thousand, eight hundred sixty-two".