13166544155587 has 8 divisors (see below), whose sum is σ = 13487786231472. Its totient is φ = 12845307168000.

The previous prime is 13166544155539. The next prime is 13166544155659. The reversal of 13166544155587 is 78555144566131.

It is a happy number.

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 13166544155587 - 2¹⁵ = 13166544122819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13166544155087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4255788 + ... + 6666694.

It is an arithmetic number, because the mean of its divisors is an integer number (1685973278934).

Almost surely, 2^{13166544155587} is an apocalyptic number.

13166544155587 is a deficient number, since it is larger than the sum of its proper divisors (321242075885).

13166544155587 is a wasteful number, since it uses less digits than its factorization.

13166544155587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544149.

The product of its digits is 60480000, while the sum is 61.

The spelling of 13166544155587 in words is "thirteen trillion, one hundred sixty-six billion, five hundred forty-four million, one hundred fifty-five thousand, five hundred eighty-seven".