1685353685020 has 48 divisors (see below), whose sum is σ = 3756779012448. Its totient is φ = 632903782400.

The previous prime is 1685353684997. The next prime is 1685353685023. The reversal of 1685353685020 is 205863535861.

It is a super-2 number, since 2×1685353685020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685353685023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6044362 + ... + 6317041.

It is an arithmetic number, because the mean of its divisors is an integer number (78266229426).

Almost surely, 2^{1685353685020} is an apocalyptic number.

1685353685020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685353685020 is an abundant number, since it is smaller than the sum of its proper divisors (2071425327428).

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

1685353685020 is a wasteful number, since it uses less digits than its factorization.

1685353685020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12361830 (or 12361828 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 1685353685020 in words is "one trillion, six hundred eighty-five billion, three hundred fifty-three million, six hundred eighty-five thousand, twenty".