13608176781 has 8 divisors (see below), whose sum is σ = 18161703040. Its totient is φ = 9063384192.

The previous prime is 13608176767. The next prime is 13608176801. The reversal of 13608176781 is 18767180631.

It is a happy number.

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

It is not a de Polignac number, because 13608176781 - 2⁵ = 13608176749 is a prime.

It is a super-2 number, since 2×13608176781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13608176781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13608174781) 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, 2179780 + ... + 2186013.

It is an arithmetic number, because the mean of its divisors is an integer number (2270212880).

Almost surely, 2^13608176781 is an apocalyptic number.

It is an amenable number.

13608176781 is a deficient number, since it is larger than the sum of its proper divisors (4553526259).

13608176781 is a wasteful number, since it uses less digits than its factorization.

13608176781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366835.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 13608176781 in words is "thirteen billion, six hundred eight million, one hundred seventy-six thousand, seven hundred eighty-one".