15505434345 has 32 divisors (see below), whose sum is σ = 25289345664. Its totient is φ = 8109504000.

The previous prime is 15505434311. The next prime is 15505434391. The reversal of 15505434345 is 54343450551.

It is a happy number.

15505434345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15505434345 - 2⁶ = 15505434281 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2263125 + ... + 2269965.

It is an arithmetic number, because the mean of its divisors is an integer number (790292052).

Almost surely, 2^15505434345 is an apocalyptic number.

15505434345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15505434345 is a deficient number, since it is larger than the sum of its proper divisors (9783911319).

15505434345 is a wasteful number, since it uses less digits than its factorization.

15505434345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9753.

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 15505434345 its reverse (54343450551), we get a palindrome (69848884896).

The spelling of 15505434345 in words is "fifteen billion, five hundred five million, four hundred thirty-four thousand, three hundred forty-five".