1355870557109 has 2 divisors, whose sum is σ = 1355870557110. Its totient is φ = 1355870557108.

The previous prime is 1355870557099. The next prime is 1355870557133. The reversal of 1355870557109 is 9017550785531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 941379241009 + 414491316100 = 970247^2 + 643810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355870557109 - 2³² = 1351575589813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355870557199) 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, 677935278554 + 677935278555.

It is an arithmetic number, because the mean of its divisors is an integer number (677935278555).

Almost surely, 2^{1355870557109} is an apocalyptic number.

It is an amenable number.

1355870557109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355870557109 is an equidigital number, since it uses as much as digits as its factorization.

1355870557109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6615000, while the sum is 56.

The spelling of 1355870557109 in words is "one trillion, three hundred fifty-five billion, eight hundred seventy million, five hundred fifty-seven thousand, one hundred nine".