1688884642065 has 16 divisors (see below), whose sum is σ = 2702240123328. Its totient is φ = 900730243776.

The previous prime is 1688884642057. The next prime is 1688884642073. The reversal of 1688884642065 is 5602464888861.

It is an interprime number because it is at equal distance from previous prime (1688884642057) and next prime (1688884642073).

It is not a de Polignac number, because 1688884642065 - 2³ = 1688884642057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1688884641987 and 1688884642005.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1414894 + ... + 2319416.

It is an arithmetic number, because the mean of its divisors is an integer number (168890007708).

Almost surely, 2^{1688884642065} is an apocalyptic number.

1688884642065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1688884642065 is a deficient number, since it is larger than the sum of its proper divisors (1013355481263).

1688884642065 is a wasteful number, since it uses less digits than its factorization.

1688884642065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029008.

The product of its (nonzero) digits is 141557760, while the sum is 66.

The spelling of 1688884642065 in words is "one trillion, six hundred eighty-eight billion, eight hundred eighty-four million, six hundred forty-two thousand, sixty-five".