911224885561 has 9 divisors (see below), whose sum is σ = 914113967781. Its totient is φ = 908344914684.

The previous prime is 911224885553. The next prime is 911224885621. The reversal of 911224885561 is 165588422119.

The square root of 911224885561 is 954581.

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

It is not a de Polignac number, because 911224885561 - 2³ = 911224885553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 911224885499 and 911224885508.

It is not an unprimeable number, because it can be changed into a prime (911224885531) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 342693250 + ... + 342695908.

Almost surely, 2^911224885561 is an apocalyptic number.

911224885561 is the 954581-st square number.

911224885561 is the 477291-st centered octagonal number.

It is an amenable number.

911224885561 is a deficient number, since it is larger than the sum of its proper divisors (2889082220).

911224885561 is an frugal number, since it uses more digits than its factorization.

911224885561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036 (or 3018 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 52.

The spelling of 911224885561 in words is "nine hundred eleven billion, two hundred twenty-four million, eight hundred eighty-five thousand, five hundred sixty-one".