13674786781 has 16 divisors (see below), whose sum is σ = 14342676480. Its totient is φ = 13013152240.

The previous prime is 13674786767. The next prime is 13674786823. The reversal of 13674786781 is 18768747631.

It is a cyclic number.

It is not a de Polignac number, because 13674786781 - 2¹¹ = 13674784733 is a prime.

It is a super-2 number, since 2×13674786781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13674780781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8703726 + ... + 8705296.

It is an arithmetic number, because the mean of its divisors is an integer number (896417280).

Almost surely, 2^13674786781 is an apocalyptic number.

It is an amenable number.

13674786781 is a deficient number, since it is larger than the sum of its proper divisors (667889699).

13674786781 is a wasteful number, since it uses less digits than its factorization.

13674786781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296.

The product of its digits is 9483264, while the sum is 58.

The spelling of 13674786781 in words is "thirteen billion, six hundred seventy-four million, seven hundred eighty-six thousand, seven hundred eighty-one".