1838192919217 has 2 divisors, whose sum is σ = 1838192919218. Its totient is φ = 1838192919216.

The previous prime is 1838192919197. The next prime is 1838192919289. The reversal of 1838192919217 is 7129192918381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1646317381921 + 191875537296 = 1283089^2 + 438036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838192919217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1838192919617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919096459608 + 919096459609.

It is an arithmetic number, because the mean of its divisors is an integer number (919096459609).

Almost surely, 2^{1838192919217} is an apocalyptic number.

It is an amenable number.

1838192919217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838192919217 is an equidigital number, since it uses as much as digits as its factorization.

1838192919217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 61.

The spelling of 1838192919217 in words is "one trillion, eight hundred thirty-eight billion, one hundred ninety-two million, nine hundred nineteen thousand, two hundred seventeen".