81351234862 has 8 divisors (see below), whose sum is σ = 122028369696. Its totient is φ = 40675111632.

The previous prime is 81351234859. The next prime is 81351234889. The reversal of 81351234862 is 26843215318.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118 + ... + 403369.

It is an arithmetic number, because the mean of its divisors is an integer number (15253546212).

Almost surely, 2^81351234862 is an apocalyptic number.

81351234862 is a deficient number, since it is larger than the sum of its proper divisors (40677134834).

81351234862 is a wasteful number, since it uses less digits than its factorization.

81351234862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505802.

The product of its digits is 276480, while the sum is 43.

The spelling of 81351234862 in words is "eighty-one billion, three hundred fifty-one million, two hundred thirty-four thousand, eight hundred sixty-two".