13888706681 has 2 divisors, whose sum is σ = 13888706682. Its totient is φ = 13888706680.

The previous prime is 13888706669. The next prime is 13888706701. The reversal of 13888706681 is 18660788831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9498451600 + 4390255081 = 97460^2 + 66259^2 .

It is a cyclic number.

It is not a de Polignac number, because 13888706681 - 2⁶ = 13888706617 is a prime.

It is a super-2 number, since 2×13888706681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13888703681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944353340 + 6944353341.

It is an arithmetic number, because the mean of its divisors is an integer number (6944353341).

Almost surely, 2^13888706681 is an apocalyptic number.

It is an amenable number.

13888706681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13888706681 is an equidigital number, since it uses as much as digits as its factorization.

13888706681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 13888706681 in words is "thirteen billion, eight hundred eighty-eight million, seven hundred six thousand, six hundred eighty-one".