1867340674561 has 2 divisors, whose sum is σ = 1867340674562. Its totient is φ = 1867340674560.

The previous prime is 1867340674469. The next prime is 1867340674607. The reversal of 1867340674561 is 1654760437681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1487460748225 + 379879926336 = 1219615^2 + 616344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1867340674561 - 2³⁷ = 1729901721089 is a prime.

It is a super-2 number, since 2×1867340674561² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1867340674496 and 1867340674505.

It is not a weakly prime, because it can be changed into another prime (1867340674361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933670337280 + 933670337281.

It is an arithmetic number, because the mean of its divisors is an integer number (933670337281).

Almost surely, 2^{1867340674561} is an apocalyptic number.

It is an amenable number.

1867340674561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1867340674561 is an equidigital number, since it uses as much as digits as its factorization.

1867340674561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 1867340674561 in words is "one trillion, eight hundred sixty-seven billion, three hundred forty million, six hundred seventy-four thousand, five hundred sixty-one".