15545435441 has 4 divisors (see below), whose sum is σ = 15545776884. Its totient is φ = 15545094000.

The previous prime is 15545435407. The next prime is 15545435467. The reversal of 15545435441 is 14453454551.

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 7556651041 + 7988784400 = 86929^2 + 89380^2 .

It is a cyclic number.

It is not a de Polignac number, because 15545435441 - 2¹⁸ = 15545173297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15545335441) 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, 89570 + ... + 197771.

It is an arithmetic number, because the mean of its divisors is an integer number (3886444221).

Almost surely, 2^15545435441 is an apocalyptic number.

It is an amenable number.

15545435441 is a deficient number, since it is larger than the sum of its proper divisors (341443).

15545435441 is an equidigital number, since it uses as much as digits as its factorization.

15545435441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341442.

The product of its digits is 480000, while the sum is 41.

Adding to 15545435441 its reverse (14453454551), we get a palindrome (29998889992).

The spelling of 15545435441 in words is "fifteen billion, five hundred forty-five million, four hundred thirty-five thousand, four hundred forty-one".