1351705520777 has 2 divisors, whose sum is σ = 1351705520778. Its totient is φ = 1351705520776.

The previous prime is 1351705520741. The next prime is 1351705520779. The reversal of 1351705520777 is 7770255071531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705295952761 + 646409568016 = 839819^2 + 803996^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351705520777 - 2⁸ = 1351705520521 is a prime.

Together with 1351705520779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1351705520779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675852760388 + 675852760389.

It is an arithmetic number, because the mean of its divisors is an integer number (675852760389).

Almost surely, 2^{1351705520777} is an apocalyptic number.

It is an amenable number.

1351705520777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351705520777 is an equidigital number, since it uses as much as digits as its factorization.

1351705520777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800750, while the sum is 50.

The spelling of 1351705520777 in words is "one trillion, three hundred fifty-one billion, seven hundred five million, five hundred twenty thousand, seven hundred seventy-seven".