15115505065 has 8 divisors (see below), whose sum is σ = 18435960648. Its totient is φ = 11894167680.

The previous prime is 15115505063. The next prime is 15115505071. The reversal of 15115505065 is 56050551151.

15115505065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1071121984 + 14044383081 = 32728^2 + 118509^2 .

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

It is not a de Polignac number, because 15115505065 - 2¹ = 15115505063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15115505065.

It is not an unprimeable number, because it can be changed into a prime (15115505063) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24779212 + ... + 24779821.

It is an arithmetic number, because the mean of its divisors is an integer number (2304495081).

Almost surely, 2^15115505065 is an apocalyptic number.

It is an amenable number.

15115505065 is a deficient number, since it is larger than the sum of its proper divisors (3320455583).

15115505065 is an equidigital number, since it uses as much as digits as its factorization.

15115505065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49559099.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 15115505065 in words is "fifteen billion, one hundred fifteen million, five hundred five thousand, sixty-five".