1798619999999 has 4 divisors (see below), whose sum is σ = 1840448372136. Its totient is φ = 1756791627864.

The previous prime is 1798619999993. The next prime is 1798620000167. The reversal of 1798619999999 is 9999999168971.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1798619999999 is a prime.

It is a Duffinian number.

1798619999999 is a modest number, since divided by 9999999 gives 179861 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798619999993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20914186004 + ... + 20914186089.

It is an arithmetic number, because the mean of its divisors is an integer number (460112093034).

Almost surely, 2^{1798619999999} is an apocalyptic number.

1798619999999 is a deficient number, since it is larger than the sum of its proper divisors (41828372137).

1798619999999 is an equidigital number, since it uses as much as digits as its factorization.

1798619999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41828372136.

The product of its digits is 14463698256, while the sum is 95.

The spelling of 1798619999999 in words is "one trillion, seven hundred ninety-eight billion, six hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".