15045015145 has 4 divisors (see below), whose sum is σ = 18054018180. Its totient is φ = 12036012112.

The previous prime is 15045015143. The next prime is 15045015187. The reversal of 15045015145 is 54151054051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54151054051 = 6089 ⋅8893259.

It can be written as a sum of positive squares in 2 ways, for example, as 9670952281 + 5374062864 = 98341^2 + 73308^2 .

It is a cyclic number.

It is not a de Polignac number, because 15045015145 - 2¹ = 15045015143 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (15045015143) 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, 1504501510 + ... + 1504501519.

It is an arithmetic number, because the mean of its divisors is an integer number (4513504545).

Almost surely, 2^15045015145 is an apocalyptic number.

It is an amenable number.

15045015145 is a deficient number, since it is larger than the sum of its proper divisors (3009003035).

15045015145 is an equidigital number, since it uses as much as digits as its factorization.

15045015145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009003034.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 15045015145 its reverse (54151054051), we get a palindrome (69196069196).

The spelling of 15045015145 in words is "fifteen billion, forty-five million, fifteen thousand, one hundred forty-five".