13685768787 has 8 divisors (see below), whose sum is σ = 18452722320. Its totient is φ = 9021330560.

The previous prime is 13685768783. The next prime is 13685768801. The reversal of 13685768787 is 78786758631.

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 13685768787 - 2² = 13685768783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13685768783) 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, 25628514 + ... + 25629047.

It is an arithmetic number, because the mean of its divisors is an integer number (2306590290).

Almost surely, 2^13685768787 is an apocalyptic number.

13685768787 is a deficient number, since it is larger than the sum of its proper divisors (4766953533).

13685768787 is an equidigital number, since it uses as much as digits as its factorization.

13685768787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51257653.

The product of its digits is 94832640, while the sum is 66.

The spelling of 13685768787 in words is "thirteen billion, six hundred eighty-five million, seven hundred sixty-eight thousand, seven hundred eighty-seven".