84181578473 has 4 divisors (see below), whose sum is σ = 84926548308. Its totient is φ = 83436608640.

The previous prime is 84181578433. The next prime is 84181578487. The reversal of 84181578473 is 37487518148.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6771314944 + 77410263529 = 82288^2 + 278227^2 .

It is a cyclic number.

It is not a de Polignac number, because 84181578473 - 2⁶ = 84181578409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84181578433) 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, 372484748 + ... + 372484973.

It is an arithmetic number, because the mean of its divisors is an integer number (21231637077).

Almost surely, 2^84181578473 is an apocalyptic number.

It is an amenable number.

84181578473 is a deficient number, since it is larger than the sum of its proper divisors (744969835).

84181578473 is a wasteful number, since it uses less digits than its factorization.

84181578473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744969834.

The product of its digits is 6021120, while the sum is 56.

The spelling of 84181578473 in words is "eighty-four billion, one hundred eighty-one million, five hundred seventy-eight thousand, four hundred seventy-three".