1555036641061 has 2 divisors, whose sum is σ = 1555036641062. Its totient is φ = 1555036641060.

The previous prime is 1555036641049. The next prime is 1555036641121. The reversal of 1555036641061 is 1601466305551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517257332900 + 37779308161 = 1231770^2 + 194369^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555036641061 - 2²⁹ = 1554499770149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1555036640999 and 1555036641017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555036041061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777518320530 + 777518320531.

It is an arithmetic number, because the mean of its divisors is an integer number (777518320531).

Almost surely, 2^{1555036641061} is an apocalyptic number.

It is an amenable number.

1555036641061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555036641061 is an equidigital number, since it uses as much as digits as its factorization.

1555036641061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 1555036641061 in words is "one trillion, five hundred fifty-five billion, thirty-six million, six hundred forty-one thousand, sixty-one".