13515112445 has 8 divisors (see below), whose sum is σ = 16361658936. Its totient is φ = 10716407296.

The previous prime is 13515112427. The next prime is 13515112451. The reversal of 13515112445 is 54421151531.

It can be written as a sum of positive squares in 4 ways, for example, as 1281425209 + 12233687236 = 35797^2 + 110606^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13515112445 - 2⁶ = 13515112381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 11959712 + ... + 11960841.

It is an arithmetic number, because the mean of its divisors is an integer number (2045207367).

Almost surely, 2^13515112445 is an apocalyptic number.

It is an amenable number.

13515112445 is a deficient number, since it is larger than the sum of its proper divisors (2846546491).

13515112445 is a wasteful number, since it uses less digits than its factorization.

13515112445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23920671.

The product of its digits is 12000, while the sum is 32.

Adding to 13515112445 its reverse (54421151531), we get a palindrome (67936263976).

The spelling of 13515112445 in words is "thirteen billion, five hundred fifteen million, one hundred twelve thousand, four hundred forty-five".