1355571887977 has 2 divisors, whose sum is σ = 1355571887978. Its totient is φ = 1355571887976.

The previous prime is 1355571887959. The next prime is 1355571887981. The reversal of 1355571887977 is 7797881755531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 923865070041 + 431706817936 = 961179^2 + 657044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355571887977 - 2¹¹ = 1355571885929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1355571887947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677785943988 + 677785943989.

It is an arithmetic number, because the mean of its divisors is an integer number (677785943989).

Almost surely, 2^{1355571887977} is an apocalyptic number.

It is an amenable number.

1355571887977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355571887977 is an equidigital number, since it uses as much as digits as its factorization.

1355571887977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518616000, while the sum is 73.

The spelling of 1355571887977 in words is "one trillion, three hundred fifty-five billion, five hundred seventy-one million, eight hundred eighty-seven thousand, nine hundred seventy-seven".