81362218862 has 4 divisors (see below), whose sum is σ = 122043328296. Its totient is φ = 40681109430.

The previous prime is 81362218859. The next prime is 81362218901. The reversal of 81362218862 is 26881226318.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20340554714 + ... + 20340554717.

It is an arithmetic number, because the mean of its divisors is an integer number (30510832074).

Almost surely, 2^81362218862 is an apocalyptic number.

81362218862 is a deficient number, since it is larger than the sum of its proper divisors (40681109434).

81362218862 is a wasteful number, since it uses less digits than its factorization.

81362218862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40681109433.

The product of its digits is 442368, while the sum is 47.

The spelling of 81362218862 in words is "eighty-one billion, three hundred sixty-two million, two hundred eighteen thousand, eight hundred sixty-two".