905985078563 has 16 divisors (see below), whose sum is σ = 916713470400. Its totient is φ = 895330972800.

The previous prime is 905985078539. The next prime is 905985078697. The reversal of 905985078563 is 365870589509.

It is a cyclic number.

It is not a de Polignac number, because 905985078563 - 2⁸ = 905985078307 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 905985078563.

It is not an unprimeable number, because it can be changed into a prime (905985078263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29556281 + ... + 29586917.

It is an arithmetic number, because the mean of its divisors is an integer number (57294591900).

Almost surely, 2^905985078563 is an apocalyptic number.

905985078563 is a deficient number, since it is larger than the sum of its proper divisors (10728391837).

905985078563 is a wasteful number, since it uses less digits than its factorization.

905985078563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31838.

The product of its (nonzero) digits is 81648000, while the sum is 65.

The spelling of 905985078563 in words is "nine hundred five billion, nine hundred eighty-five million, seventy-eight thousand, five hundred sixty-three".