1798819593881 has 2 divisors, whose sum is σ = 1798819593882. Its totient is φ = 1798819593880.

The previous prime is 1798819593847. The next prime is 1798819593917. The reversal of 1798819593881 is 1883959188971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1656150217225 + 142669376656 = 1286915^2 + 377716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798819593881 - 2¹⁸ = 1798819331737 is a prime.

It is a super-2 number, since 2×1798819593881² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1798819592881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899409796940 + 899409796941.

It is an arithmetic number, because the mean of its divisors is an integer number (899409796941).

Almost surely, 2^{1798819593881} is an apocalyptic number.

It is an amenable number.

1798819593881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798819593881 is an equidigital number, since it uses as much as digits as its factorization.

1798819593881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 313528320, while the sum is 77.

The spelling of 1798819593881 in words is "one trillion, seven hundred ninety-eight billion, eight hundred nineteen million, five hundred ninety-three thousand, eight hundred eighty-one".