84451608655 has 4 divisors (see below), whose sum is σ = 101341930392. Its totient is φ = 67561286920.

The previous prime is 84451608643. The next prime is 84451608749. The reversal of 84451608655 is 55680615448.

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

It is not a de Polignac number, because 84451608655 - 2¹¹ = 84451606607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 8445160861 + ... + 8445160870.

It is an arithmetic number, because the mean of its divisors is an integer number (25335482598).

Almost surely, 2^84451608655 is an apocalyptic number.

84451608655 is a deficient number, since it is larger than the sum of its proper divisors (16890321737).

84451608655 is a wasteful number, since it uses less digits than its factorization.

84451608655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16890321736.

The product of its (nonzero) digits is 4608000, while the sum is 52.

The spelling of 84451608655 in words is "eighty-four billion, four hundred fifty-one million, six hundred eight thousand, six hundred fifty-five".