13988402881 has 2 divisors, whose sum is σ = 13988402882. Its totient is φ = 13988402880.

The previous prime is 13988402863. The next prime is 13988402887. The reversal of 13988402881 is 18820488931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11509856656 + 2478546225 = 107284^2 + 49785^2 .

It is a cyclic number.

It is not a de Polignac number, because 13988402881 - 2⁵ = 13988402849 is a prime.

It is a super-2 number, since 2×13988402881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13988402887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994201440 + 6994201441.

It is an arithmetic number, because the mean of its divisors is an integer number (6994201441).

Almost surely, 2^13988402881 is an apocalyptic number.

It is an amenable number.

13988402881 is a deficient number, since it is larger than the sum of its proper divisors (1).

13988402881 is an equidigital number, since it uses as much as digits as its factorization.

13988402881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 13988402881 in words is "thirteen billion, nine hundred eighty-eight million, four hundred two thousand, eight hundred eighty-one".