12665611415545 has 32 divisors (see below), whose sum is σ = 16726294093824. Its totient is φ = 9130585464000.

The previous prime is 12665611415533. The next prime is 12665611415579. The reversal of 12665611415545 is 54551411656621.

It is not a de Polignac number, because 12665611415545 - 2¹⁵ = 12665611382777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12665611415492 and 12665611415501.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2198284 + ... + 5492146.

It is an arithmetic number, because the mean of its divisors is an integer number (522696690432).

Almost surely, 2^{12665611415545} is an apocalyptic number.

It is an amenable number.

12665611415545 is a deficient number, since it is larger than the sum of its proper divisors (4060682678279).

12665611415545 is a wasteful number, since it uses less digits than its factorization.

12665611415545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294493.

The product of its digits is 4320000, while the sum is 52.

The spelling of 12665611415545 in words is "twelve trillion, six hundred sixty-five billion, six hundred eleven million, four hundred fifteen thousand, five hundred forty-five".