1838319423881 has 2 divisors, whose sum is σ = 1838319423882. Its totient is φ = 1838319423880.

The previous prime is 1838319423859. The next prime is 1838319423901. The reversal of 1838319423881 is 1883249138381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1579458265225 + 258861158656 = 1256765^2 + 508784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838319423881 - 2¹⁴ = 1838319407497 is a prime.

It is a super-2 number, since 2×1838319423881² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1838319423881.

It is not a weakly prime, because it can be changed into another prime (1838319423581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919159711940 + 919159711941.

It is an arithmetic number, because the mean of its divisors is an integer number (919159711941).

Almost surely, 2^{1838319423881} is an apocalyptic number.

It is an amenable number.

1838319423881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838319423881 is an equidigital number, since it uses as much as digits as its factorization.

1838319423881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7962624, while the sum is 59.

The spelling of 1838319423881 in words is "one trillion, eight hundred thirty-eight billion, three hundred nineteen million, four hundred twenty-three thousand, eight hundred eighty-one".