1798154398487 has 2 divisors, whose sum is σ = 1798154398488. Its totient is φ = 1798154398486.

The previous prime is 1798154398463. The next prime is 1798154398543. The reversal of 1798154398487 is 7848934518971.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1798154398487 - 2¹² = 1798154394391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1798154398427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899077199243 + 899077199244.

It is an arithmetic number, because the mean of its divisors is an integer number (899077199244).

Almost surely, 2^{1798154398487} is an apocalyptic number.

1798154398487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798154398487 is an equidigital number, since it uses as much as digits as its factorization.

1798154398487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 487710720, while the sum is 74.

The spelling of 1798154398487 in words is "one trillion, seven hundred ninety-eight billion, one hundred fifty-four million, three hundred ninety-eight thousand, four hundred eighty-seven".