15115440405145 has 8 divisors (see below), whose sum is σ = 18138549492360. Its totient is φ = 12092338320000.

The previous prime is 15115440405127. The next prime is 15115440405217. The reversal of 15115440405145 is 54150404451151.

It can be written as a sum of positive squares in 4 ways, for example, as 366033424 + 15115074371721 = 19132^2 + 3887811^2 .

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

It is not a de Polignac number, because 15115440405145 - 2¹⁷ = 15115440274073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15115440405098 and 15115440405107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6760741 + ... + 8714269.

It is an arithmetic number, because the mean of its divisors is an integer number (2267318686545).

Almost surely, 2^{15115440405145} is an apocalyptic number.

It is an amenable number.

15115440405145 is a deficient number, since it is larger than the sum of its proper divisors (3023109087215).

15115440405145 is a wasteful number, since it uses less digits than its factorization.

15115440405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501035.

The product of its (nonzero) digits is 160000, while the sum is 40.

Adding to 15115440405145 its reverse (54150404451151), we get a palindrome (69265844856296).

The spelling of 15115440405145 in words is "fifteen trillion, one hundred fifteen billion, four hundred forty million, four hundred five thousand, one hundred forty-five".