12545521105 has 8 divisors (see below), whose sum is σ = 16212673512. Its totient is φ = 9264384768.

The previous prime is 12545521103. The next prime is 12545521199. The reversal of 12545521105 is 50112554521.

It can be written as a sum of positive squares in 4 ways, for example, as 1277061696 + 11268459409 = 35736^2 + 106153^2 .

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 12545521105 - 2¹ = 12545521103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12545521103) 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, 96503944 + ... + 96504073.

It is an arithmetic number, because the mean of its divisors is an integer number (2026584189).

Almost surely, 2^12545521105 is an apocalyptic number.

It is an amenable number.

12545521105 is a deficient number, since it is larger than the sum of its proper divisors (3667152407).

12545521105 is a wasteful number, since it uses less digits than its factorization.

12545521105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193008035.

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

The spelling of 12545521105 in words is "twelve billion, five hundred forty-five million, five hundred twenty-one thousand, one hundred five".