84448424591 has 4 divisors (see below), whose sum is σ = 85237662312. Its totient is φ = 83659186872.

The previous prime is 84448424581. The next prime is 84448424609. The reversal of 84448424591 is 19542484448.

It is a happy number.

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 84448424591 - 2²⁶ = 84381315727 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 (84448424581) 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, 394618700 + ... + 394618913.

It is an arithmetic number, because the mean of its divisors is an integer number (21309415578).

Almost surely, 2^84448424591 is an apocalyptic number.

84448424591 is a deficient number, since it is larger than the sum of its proper divisors (789237721).

84448424591 is a wasteful number, since it uses less digits than its factorization.

84448424591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789237720.

The product of its digits is 5898240, while the sum is 53.

The spelling of 84448424591 in words is "eighty-four billion, four hundred forty-eight million, four hundred twenty-four thousand, five hundred ninety-one".