905434564609 has 4 divisors (see below), whose sum is σ = 911948482480. Its totient is φ = 898920646740.

The previous prime is 905434564561. The next prime is 905434564637. The reversal of 905434564609 is 906465434509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 905434564609 - 2²⁵ = 905401010177 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 905434564609.

It is not an unprimeable number, because it can be changed into a prime (905434564409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3256958727 + ... + 3256959004.

It is an arithmetic number, because the mean of its divisors is an integer number (227987120620).

Almost surely, 2^905434564609 is an apocalyptic number.

It is an amenable number.

905434564609 is a deficient number, since it is larger than the sum of its proper divisors (6513917871).

905434564609 is a wasteful number, since it uses less digits than its factorization.

905434564609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6513917870.

The product of its (nonzero) digits is 13996800, while the sum is 55.

The spelling of 905434564609 in words is "nine hundred five billion, four hundred thirty-four million, five hundred sixty-four thousand, six hundred nine".