1318781025077 has 2 divisors, whose sum is σ = 1318781025078. Its totient is φ = 1318781025076.

The previous prime is 1318781025019. The next prime is 1318781025113. The reversal of 1318781025077 is 7705201878131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994170520561 + 324610504516 = 997081^2 + 569746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318781025077 - 2¹⁸ = 1318780762933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318781025677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659390512538 + 659390512539.

It is an arithmetic number, because the mean of its divisors is an integer number (659390512539).

Almost surely, 2^{1318781025077} is an apocalyptic number.

It is an amenable number.

1318781025077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318781025077 is an equidigital number, since it uses as much as digits as its factorization.

1318781025077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658560, while the sum is 50.

The spelling of 1318781025077 in words is "one trillion, three hundred eighteen billion, seven hundred eighty-one million, twenty-five thousand, seventy-seven".