13381919077 has 2 divisors, whose sum is σ = 13381919078. Its totient is φ = 13381919076.

The previous prime is 13381919063. The next prime is 13381919197. The reversal of 13381919077 is 77091918331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8437157316 + 4944761761 = 91854^2 + 70319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13381919077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13381919077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13381119077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6690959538 + 6690959539.

It is an arithmetic number, because the mean of its divisors is an integer number (6690959539).

Almost surely, 2^13381919077 is an apocalyptic number.

It is an amenable number.

13381919077 is a deficient number, since it is larger than the sum of its proper divisors (1).

13381919077 is an equidigital number, since it uses as much as digits as its factorization.

13381919077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 13381919077 in words is "thirteen billion, three hundred eighty-one million, nine hundred nineteen thousand, seventy-seven".