13185778487 has 8 divisors (see below), whose sum is σ = 15070788096. Its totient is φ = 11301100632.

The previous prime is 13185778453. The next prime is 13185778511. The reversal of 13185778487 is 78487758131.

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 13185778487 - 2¹⁴ = 13185762103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13185778427) 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, 9038 + ... + 162644.

It is an arithmetic number, because the mean of its divisors is an integer number (1883848512).

Almost surely, 2^13185778487 is an apocalyptic number.

13185778487 is a deficient number, since it is larger than the sum of its proper divisors (1885009609).

13185778487 is a wasteful number, since it uses less digits than its factorization.

13185778487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165877.

The product of its digits is 10536960, while the sum is 59.

The spelling of 13185778487 in words is "thirteen billion, one hundred eighty-five million, seven hundred seventy-eight thousand, four hundred eighty-seven".