981786079543 has 4 divisors (see below), whose sum is σ = 997880933368. Its totient is φ = 965691225720.

The previous prime is 981786079523. The next prime is 981786079567. The reversal of 981786079543 is 345970687189.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981786079543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981786079523) by changing a digit.

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, 8047426821 + ... + 8047426942.

It is an arithmetic number, because the mean of its divisors is an integer number (249470233342).

Almost surely, 2^981786079543 is an apocalyptic number.

981786079543 is a deficient number, since it is larger than the sum of its proper divisors (16094853825).

981786079543 is a wasteful number, since it uses less digits than its factorization.

981786079543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16094853824.

The product of its (nonzero) digits is 91445760, while the sum is 67.

The spelling of 981786079543 in words is "nine hundred eighty-one billion, seven hundred eighty-six million, seventy-nine thousand, five hundred forty-three".