80842539439 has 4 divisors (see below), whose sum is σ = 81557960256. Its totient is φ = 80127118624.

The previous prime is 80842539419. The next prime is 80842539469. The reversal of 80842539439 is 93493524808.

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

It is a cyclic number.

It is not a de Polignac number, because 80842539439 - 2⁷ = 80842539311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80842539439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80842539419) 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, 357710239 + ... + 357710464.

It is an arithmetic number, because the mean of its divisors is an integer number (20389490064).

Almost surely, 2^80842539439 is an apocalyptic number.

80842539439 is a deficient number, since it is larger than the sum of its proper divisors (715420817).

80842539439 is a wasteful number, since it uses less digits than its factorization.

80842539439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715420816.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 80842539439 in words is "eighty billion, eight hundred forty-two million, five hundred thirty-nine thousand, four hundred thirty-nine".