84355850585 has 4 divisors (see below), whose sum is σ = 101227020708. Its totient is φ = 67484680464.

The previous prime is 84355850531. The next prime is 84355850587. The reversal of 84355850585 is 58505855348.

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 43235716624 + 41120133961 = 207932^2 + 202781^2 .

It is a cyclic number.

It is not a de Polignac number, because 84355850585 - 2⁶ = 84355850521 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 84355850585.

It is not an unprimeable number, because it can be changed into a prime (84355850587) 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, 8435585054 + ... + 8435585063.

It is an arithmetic number, because the mean of its divisors is an integer number (25306755177).

Almost surely, 2^84355850585 is an apocalyptic number.

It is an amenable number.

84355850585 is a deficient number, since it is larger than the sum of its proper divisors (16871170123).

84355850585 is a wasteful number, since it uses less digits than its factorization.

84355850585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16871170122.

The product of its (nonzero) digits is 19200000, while the sum is 56.

The spelling of 84355850585 in words is "eighty-four billion, three hundred fifty-five million, eight hundred fifty thousand, five hundred eighty-five".