81053984543 has 8 divisors (see below), whose sum is σ = 92663196288. Its totient is φ = 69452290584.

The previous prime is 81053984537. The next prime is 81053984569. The reversal of 81053984543 is 34548935018.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81053984543 - 2⁴ = 81053984527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81053984491 and 81053984500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81053984593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856321 + ... + 1899482.

It is an arithmetic number, because the mean of its divisors is an integer number (11582899536).

Almost surely, 2^81053984543 is an apocalyptic number.

81053984543 is a deficient number, since it is larger than the sum of its proper divisors (11609211745).

81053984543 is a wasteful number, since it uses less digits than its factorization.

81053984543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758893.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 81053984543 in words is "eighty-one billion, fifty-three million, nine hundred eighty-four thousand, five hundred forty-three".