1355724778741 has 2 divisors, whose sum is σ = 1355724778742. Its totient is φ = 1355724778740.

The previous prime is 1355724778739. The next prime is 1355724778801. The reversal of 1355724778741 is 1478774275531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826046494641 + 529678284100 = 908871^2 + 727790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355724778741 - 2¹ = 1355724778739 is a prime.

Together with 1355724778739, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1355724778741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355724728741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677862389370 + 677862389371.

It is an arithmetic number, because the mean of its divisors is an integer number (677862389371).

Almost surely, 2^{1355724778741} is an apocalyptic number.

It is an amenable number.

1355724778741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355724778741 is an equidigital number, since it uses as much as digits as its factorization.

1355724778741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46099200, while the sum is 61.

The spelling of 1355724778741 in words is "one trillion, three hundred fifty-five billion, seven hundred twenty-four million, seven hundred seventy-eight thousand, seven hundred forty-one".