1605407998487 has 2 divisors, whose sum is σ = 1605407998488. Its totient is φ = 1605407998486.

The previous prime is 1605407998451. The next prime is 1605407998501. The reversal of 1605407998487 is 7848997045061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1605407998487 - 2¹⁰ = 1605407997463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605407998427) 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, 802703999243 + 802703999244.

It is an arithmetic number, because the mean of its divisors is an integer number (802703999244).

Almost surely, 2^{1605407998487} is an apocalyptic number.

1605407998487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605407998487 is an equidigital number, since it uses as much as digits as its factorization.

1605407998487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121927680, while the sum is 68.

The spelling of 1605407998487 in words is "one trillion, six hundred five billion, four hundred seven million, nine hundred ninety-eight thousand, four hundred eighty-seven".