1555089464809 has 2 divisors, whose sum is σ = 1555089464810. Its totient is φ = 1555089464808.

The previous prime is 1555089464723. The next prime is 1555089464827. The reversal of 1555089464809 is 9084649805551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143182224809 + 411907240000 = 1069197^2 + 641800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555089464809 - 2³¹ = 1552941981161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1555089464839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777544732404 + 777544732405.

It is an arithmetic number, because the mean of its divisors is an integer number (777544732405).

Almost surely, 2^{1555089464809} is an apocalyptic number.

It is an amenable number.

1555089464809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555089464809 is an equidigital number, since it uses as much as digits as its factorization.

1555089464809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208000, while the sum is 64.

The spelling of 1555089464809 in words is "one trillion, five hundred fifty-five billion, eighty-nine million, four hundred sixty-four thousand, eight hundred nine".