1687814411841 has 20 divisors (see below), whose sum is σ = 2527955570800. Its totient is φ = 1122240696696.

The previous prime is 1687814411819. The next prime is 1687814411861. The reversal of 1687814411841 is 1481144187861.

1687814411841 is a `hidden beast` number, since 1 + 6 + 87 + 81 + 441 + 1 + 8 + 41 = 666.

It is not a de Polignac number, because 1687814411841 - 2²² = 1687810217537 is a prime.

It is a super-2 number, since 2×1687814411841² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1687814411861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27459031 + ... + 27520428.

It is an arithmetic number, because the mean of its divisors is an integer number (126397778540).

Almost surely, 2^{1687814411841} is an apocalyptic number.

It is an amenable number.

1687814411841 is a deficient number, since it is larger than the sum of its proper divisors (840141158959).

1687814411841 is an equidigital number, since it uses as much as digits as its factorization.

1687814411841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54979850 (or 54979841 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 54.

The spelling of 1687814411841 in words is "one trillion, six hundred eighty-seven billion, eight hundred fourteen million, four hundred eleven thousand, eight hundred forty-one".