11451243205 has 8 divisors (see below), whose sum is σ = 13742807832. Its totient is φ = 9160117248.

The previous prime is 11451243187. The next prime is 11451243263. The reversal of 11451243205 is 50234215411.

It can be written as a sum of positive squares in 4 ways, for example, as 266277124 + 11184966081 = 16318^2 + 105759^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11451243205 - 2¹⁵ = 11451210437 is a prime.

It is a super-2 number, since 2×11451243205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 49204 + ... + 159133.

It is an arithmetic number, because the mean of its divisors is an integer number (1717850979).

Almost surely, 2^11451243205 is an apocalyptic number.

It is an amenable number.

11451243205 is a deficient number, since it is larger than the sum of its proper divisors (2291564627).

11451243205 is a wasteful number, since it uses less digits than its factorization.

11451243205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219335.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 11451243205 its reverse (50234215411), we get a palindrome (61685458616).

The spelling of 11451243205 in words is "eleven billion, four hundred fifty-one million, two hundred forty-three thousand, two hundred five".