905911818436 has 9 divisors (see below), whose sum is σ = 1585349013549. Its totient is φ = 452954957424.

The previous prime is 905911818433. The next prime is 905911818457. The reversal of 905911818436 is 634818119509.

It is a happy number.

The square root of 905911818436 is 951794.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 616743208900 + 289168609536 = 785330^2 + 537744^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (905911818431) 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 2 ways as a sum of consecutive naturals, for example, 1665640 + ... + 2141536.

Almost surely, 2^905911818436 is an apocalyptic number.

905911818436 is the 951794-th square number.

It is an amenable number.

905911818436 is a deficient number, since it is larger than the sum of its proper divisors (679437195113).

905911818436 is an frugal number, since it uses more digits than its factorization.

905911818436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951798 (or 475899 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 905911818436 in words is "nine hundred five billion, nine hundred eleven million, eight hundred eighteen thousand, four hundred thirty-six".