84549380579 has 4 divisors (see below), whose sum is σ = 84550026120. Its totient is φ = 84548735040.

The previous prime is 84549380569. The next prime is 84549380599. The reversal of 84549380579 is 97508394548.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 84549380579 - 2⁸ = 84549380323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84549380519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48782 + ... + 414099.

It is an arithmetic number, because the mean of its divisors is an integer number (21137506530).

Almost surely, 2^84549380579 is an apocalyptic number.

84549380579 is a deficient number, since it is larger than the sum of its proper divisors (645541).

84549380579 is a wasteful number, since it uses less digits than its factorization.

84549380579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645540.

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 84549380579 in words is "eighty-four billion, five hundred forty-nine million, three hundred eighty thousand, five hundred seventy-nine".