84155787447113 has 4 divisors (see below), whose sum is σ = 84156621128580. Its totient is φ = 84154953765648.

The previous prime is 84155787447073. The next prime is 84155787447163. The reversal of 84155787447113 is 31174478755148.

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 43784847808144 + 40370939638969 = 6617012^2 + 6353813^2 .

It is a cyclic number.

It is not a de Polignac number, because 84155787447113 - 2²⁴ = 84155770669897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84155787447113.

It is not an unprimeable number, because it can be changed into a prime (84155787447163) by changing a digit.

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, 416689298 + ... + 416891211.

It is an arithmetic number, because the mean of its divisors is an integer number (21039155282145).

Almost surely, 2^{84155787447113} is an apocalyptic number.

It is an amenable number.

84155787447113 is a deficient number, since it is larger than the sum of its proper divisors (833681467).

84155787447113 is a wasteful number, since it uses less digits than its factorization.

84155787447113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833681466.

The product of its digits is 105369600, while the sum is 65.

The spelling of 84155787447113 in words is "eighty-four trillion, one hundred fifty-five billion, seven hundred eighty-seven million, four hundred forty-seven thousand, one hundred thirteen".