15005040065 has 4 divisors (see below), whose sum is σ = 18006048084. Its totient is φ = 12004032048.

The previous prime is 15005040049. The next prime is 15005040073. The reversal of 15005040065 is 56004050051.

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 3918634801 + 11086405264 = 62599^2 + 105292^2 .

It is a cyclic number.

It is not a de Polignac number, because 15005040065 - 2⁴ = 15005040049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500504002 + ... + 1500504011.

It is an arithmetic number, because the mean of its divisors is an integer number (4501512021).

Almost surely, 2^15005040065 is an apocalyptic number.

It is an amenable number.

15005040065 is a deficient number, since it is larger than the sum of its proper divisors (3001008019).

15005040065 is an equidigital number, since it uses as much as digits as its factorization.

15005040065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001008018.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 15005040065 in words is "fifteen billion, five million, forty thousand, sixty-five".