1687154199041 has 2 divisors, whose sum is σ = 1687154199042. Its totient is φ = 1687154199040.

The previous prime is 1687154199019. The next prime is 1687154199047. The reversal of 1687154199041 is 1409914517861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1687154199025 + 16 = 1298905^2 + 4^2 .

It is an emirp because it is prime and its reverse (1409914517861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1687154199041 - 2¹⁰ = 1687154198017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1687154199047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843577099520 + 843577099521.

It is an arithmetic number, because the mean of its divisors is an integer number (843577099521).

Almost surely, 2^{1687154199041} is an apocalyptic number.

It is an amenable number.

1687154199041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687154199041 is an equidigital number, since it uses as much as digits as its factorization.

1687154199041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 1687154199041 in words is "one trillion, six hundred eighty-seven billion, one hundred fifty-four million, one hundred ninety-nine thousand, forty-one".