15115550065 has 32 divisors (see below), whose sum is σ = 22704675840. Its totient is φ = 9385080000.

The previous prime is 15115550057. The next prime is 15115550069. The reversal of 15115550065 is 56005551151.

It is not a de Polignac number, because 15115550065 - 2³ = 15115550057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15115550065.

It is not an unprimeable number, because it can be changed into a prime (15115550069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18426 + ... + 174844.

It is an arithmetic number, because the mean of its divisors is an integer number (709521120).

Almost surely, 2^15115550065 is an apocalyptic number.

It is an amenable number.

15115550065 is a deficient number, since it is larger than the sum of its proper divisors (7589125775).

15115550065 is a wasteful number, since it uses less digits than its factorization.

15115550065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156693.

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

The spelling of 15115550065 in words is "fifteen billion, one hundred fifteen million, five hundred fifty thousand, sixty-five".