1555606001597 has 2 divisors, whose sum is σ = 1555606001598. Its totient is φ = 1555606001596.

The previous prime is 1555606001533. The next prime is 1555606001623. The reversal of 1555606001597 is 7951006065551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1555560222841 + 45778756 = 1247221^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555606001597 - 2⁶ = 1555606001533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555606001527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777803000798 + 777803000799.

It is an arithmetic number, because the mean of its divisors is an integer number (777803000799).

Almost surely, 2^{1555606001597} is an apocalyptic number.

It is an amenable number.

1555606001597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555606001597 is an equidigital number, since it uses as much as digits as its factorization.

1555606001597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417500, while the sum is 50.

The spelling of 1555606001597 in words is "one trillion, five hundred fifty-five billion, six hundred six million, one thousand, five hundred ninety-seven".