13545120815234 has 4 divisors (see below), whose sum is σ = 20317681222854. Its totient is φ = 6772560407616.

The previous prime is 13545120815189. The next prime is 13545120815243. The reversal of 13545120815234 is 43251802154531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12668936829025 + 876183986209 = 3559345^2 + 936047^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3386280203807 + ... + 3386280203810.

Almost surely, 2^{13545120815234} is an apocalyptic number.

13545120815234 is a deficient number, since it is larger than the sum of its proper divisors (6772560407620).

13545120815234 is an equidigital number, since it uses as much as digits as its factorization.

13545120815234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772560407619.

The product of its (nonzero) digits is 576000, while the sum is 44.

Adding to 13545120815234 its reverse (43251802154531), we get a palindrome (56796922969765).

The spelling of 13545120815234 in words is "thirteen trillion, five hundred forty-five billion, one hundred twenty million, eight hundred fifteen thousand, two hundred thirty-four".