13668401787 has 8 divisors (see below), whose sum is σ = 18648362304. Its totient is φ = 8900354568.

The previous prime is 13668401779. The next prime is 13668401809. The reversal of 13668401787 is 78710486631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13668401787 - 2³ = 13668401779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13668401707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52978173 + ... + 52978430.

It is an arithmetic number, because the mean of its divisors is an integer number (2331045288).

Almost surely, 2^13668401787 is an apocalyptic number.

13668401787 is a deficient number, since it is larger than the sum of its proper divisors (4979960517).

13668401787 is a wasteful number, since it uses less digits than its factorization.

13668401787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105956649.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 13668401787 in words is "thirteen billion, six hundred sixty-eight million, four hundred one thousand, seven hundred eighty-seven".