11561223445 has 8 divisors (see below), whose sum is σ = 13874503680. Its totient is φ = 9248288400.

The previous prime is 11561223407. The next prime is 11561223451. The reversal of 11561223445 is 54432216511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11561223445 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11561223445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5781 + ... + 152170.

It is an arithmetic number, because the mean of its divisors is an integer number (1734312960).

Almost surely, 2^11561223445 is an apocalyptic number.

It is an amenable number.

11561223445 is a deficient number, since it is larger than the sum of its proper divisors (2313280235).

11561223445 is a wasteful number, since it uses less digits than its factorization.

11561223445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172595.

The product of its digits is 28800, while the sum is 34.

Adding to 11561223445 its reverse (54432216511), we get a palindrome (65993439956).

The spelling of 11561223445 in words is "eleven billion, five hundred sixty-one million, two hundred twenty-three thousand, four hundred forty-five".