1688285039870 has 64 divisors (see below), whose sum is σ = 3610306365120. Its totient is φ = 560329651200.

The previous prime is 1688285039851. The next prime is 1688285039887. The reversal of 1688285039870 is 789305828861.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1688285039797 and 1688285039806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6505421 + ... + 6759960.

It is an arithmetic number, because the mean of its divisors is an integer number (56411036955).

Almost surely, 2^{1688285039870} is an apocalyptic number.

1688285039870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1688285039870 is an abundant number, since it is smaller than the sum of its proper divisors (1922021325250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1688285039870 is a wasteful number, since it uses less digits than its factorization.

1688285039870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265501.

The product of its (nonzero) digits is 46448640, while the sum is 65.

The spelling of 1688285039870 in words is "one trillion, six hundred eighty-eight billion, two hundred eighty-five million, thirty-nine thousand, eight hundred seventy".