81362453234 has 8 divisors (see below), whose sum is σ = 122082225408. Its totient is φ = 40668378100.

The previous prime is 81362453147. The next prime is 81362453297. The reversal of 81362453234 is 43235426318.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81362453191 and 81362453200.

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, 6416342 + ... + 6429009.

It is an arithmetic number, because the mean of its divisors is an integer number (15260278176).

Almost surely, 2^81362453234 is an apocalyptic number.

81362453234 is a deficient number, since it is larger than the sum of its proper divisors (40719772174).

81362453234 is a wasteful number, since it uses less digits than its factorization.

81362453234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12848520.

The product of its digits is 414720, while the sum is 41.

The spelling of 81362453234 in words is "eighty-one billion, three hundred sixty-two million, four hundred fifty-three thousand, two hundred thirty-four".