1798619999993 has 2 divisors, whose sum is σ = 1798619999994. Its totient is φ = 1798619999992.

The previous prime is 1798619999989. The next prime is 1798620000167. The reversal of 1798619999993 is 3999999168971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1384074602089 + 414545397904 = 1176467^2 + 643852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798619999993 - 2² = 1798619999989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1798619999899 and 1798619999908.

It is not a weakly prime, because it can be changed into another prime (1798619999893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899309999996 + 899309999997.

It is an arithmetic number, because the mean of its divisors is an integer number (899309999997).

Almost surely, 2^{1798619999993} is an apocalyptic number.

It is an amenable number.

1798619999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798619999993 is an equidigital number, since it uses as much as digits as its factorization.

1798619999993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4821232752, while the sum is 89.

The spelling of 1798619999993 in words is "one trillion, seven hundred ninety-eight billion, six hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-three".