11505405145 has 8 divisors (see below), whose sum is σ = 14868523656. Its totient is φ = 8496299136.

The previous prime is 11505405143. The next prime is 11505405151. The reversal of 11505405145 is 54150450511.

It can be written as a sum of positive squares in 4 ways, for example, as 2010266896 + 9495138249 = 44836^2 + 97443^2 .

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

It is not a de Polignac number, because 11505405145 - 2¹ = 11505405143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505405143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88503052 + ... + 88503181.

It is an arithmetic number, because the mean of its divisors is an integer number (1858565457).

Almost surely, 2^11505405145 is an apocalyptic number.

It is an amenable number.

11505405145 is a deficient number, since it is larger than the sum of its proper divisors (3363118511).

11505405145 is a wasteful number, since it uses less digits than its factorization.

11505405145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177006251.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 11505405145 its reverse (54150450511), we get a palindrome (65655855656).

The spelling of 11505405145 in words is "eleven billion, five hundred five million, four hundred five thousand, one hundred forty-five".