13515655005505 has 4 divisors (see below), whose sum is σ = 16218786006612. Its totient is φ = 10812524004400.

The previous prime is 13515655005499. The next prime is 13515655005547. The reversal of 13515655005505 is 50550055651531.

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 6476943560256 + 7038711445249 = 2544984^2 + 2653057^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13515655005505 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, 1351565500546 + ... + 1351565500555.

It is an arithmetic number, because the mean of its divisors is an integer number (4054696501653).

Almost surely, 2^{13515655005505} is an apocalyptic number.

It is an amenable number.

13515655005505 is a deficient number, since it is larger than the sum of its proper divisors (2703131001107).

13515655005505 is an equidigital number, since it uses as much as digits as its factorization.

13515655005505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703131001106.

The product of its (nonzero) digits is 1406250, while the sum is 46.

The spelling of 13515655005505 in words is "thirteen trillion, five hundred fifteen billion, six hundred fifty-five million, five thousand, five hundred five".