84408880447 has 4 divisors (see below), whose sum is σ = 84451108000. Its totient is φ = 84366652896.

The previous prime is 84408880333. The next prime is 84408880453. The reversal of 84408880447 is 74408880448.

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 84408880447 - 2³¹ = 82261396799 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 (84408880147) 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, 21110778 + ... + 21114775.

It is an arithmetic number, because the mean of its divisors is an integer number (21112777000).

Almost surely, 2^84408880447 is an apocalyptic number.

84408880447 is a deficient number, since it is larger than the sum of its proper divisors (42227553).

84408880447 is a wasteful number, since it uses less digits than its factorization.

84408880447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42227552.

The product of its (nonzero) digits is 7340032, while the sum is 55.

Subtracting from 84408880447 its reverse (74408880448), we obtain a palindrome (9999999999).

The spelling of 84408880447 in words is "eighty-four billion, four hundred eight million, eight hundred eighty thousand, four hundred forty-seven".