1318881945077 has 2 divisors, whose sum is σ = 1318881945078. Its totient is φ = 1318881945076.

The previous prime is 1318881945041. The next prime is 1318881945083. The reversal of 1318881945077 is 7705491888131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870462876196 + 448419068881 = 932986^2 + 669641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318881945077 - 2¹⁰ = 1318881944053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318881945377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659440972538 + 659440972539.

It is an arithmetic number, because the mean of its divisors is an integer number (659440972539).

Almost surely, 2^{1318881945077} is an apocalyptic number.

It is an amenable number.

1318881945077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318881945077 is an equidigital number, since it uses as much as digits as its factorization.

1318881945077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 62.

The spelling of 1318881945077 in words is "one trillion, three hundred eighteen billion, eight hundred eighty-one million, nine hundred forty-five thousand, seventy-seven".