13881974377 has 2 divisors, whose sum is σ = 13881974378. Its totient is φ = 13881974376.

The previous prime is 13881974363. The next prime is 13881974401. The reversal of 13881974377 is 77347918831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12781659136 + 1100315241 = 113056^2 + 33171^2 .

It is a cyclic number.

It is not a de Polignac number, because 13881974377 - 2²³ = 13873585769 is a prime.

It is not a weakly prime, because it can be changed into another prime (13881974347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940987188 + 6940987189.

It is an arithmetic number, because the mean of its divisors is an integer number (6940987189).

Almost surely, 2^13881974377 is an apocalyptic number.

It is an amenable number.

13881974377 is a deficient number, since it is larger than the sum of its proper divisors (1).

13881974377 is an equidigital number, since it uses as much as digits as its factorization.

13881974377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 58.

The spelling of 13881974377 in words is "thirteen billion, eight hundred eighty-one million, nine hundred seventy-four thousand, three hundred seventy-seven".