15505445105 has 4 divisors (see below), whose sum is σ = 18606534132. Its totient is φ = 12404356080.

The previous prime is 15505445093. The next prime is 15505445107. The reversal of 15505445105 is 50154450551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3678665104 + 11826780001 = 60652^2 + 108751^2 .

It is not a de Polignac number, because 15505445105 - 2¹⁴ = 15505428721 is a prime.

It is a super-2 number, since 2×15505445105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15505445107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550544506 + ... + 1550544515.

It is an arithmetic number, because the mean of its divisors is an integer number (4651633533).

Almost surely, 2^15505445105 is an apocalyptic number.

It is an amenable number.

15505445105 is a deficient number, since it is larger than the sum of its proper divisors (3101089027).

15505445105 is an equidigital number, since it uses as much as digits as its factorization.

15505445105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101089026.

The product of its (nonzero) digits is 50000, while the sum is 35.

Adding to 15505445105 its reverse (50154450551), we get a palindrome (65659895656).

The spelling of 15505445105 in words is "fifteen billion, five hundred five million, four hundred forty-five thousand, one hundred five".