1685685632 has 64 divisors (see below), whose sum is σ = 3444152400. Its totient is φ = 821551104.

The previous prime is 1685685623. The next prime is 1685685641. The reversal of 1685685632 is 2365865861.

It is an interprime number because it is at equal distance from previous prime (1685685623) and next prime (1685685641).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830603 + ... + 832629.

Almost surely, 2^1685685632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685685632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722076200).

1685685632 is an abundant number, since it is smaller than the sum of its proper divisors (1758466768).

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

1685685632 is an equidigital number, since it uses as much as digits as its factorization.

1685685632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2191 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 50.

The square root of 1685685632 is about 41057.1020896507. The cubic root of 1685685632 is about 1190.1239500859.

The spelling of 1685685632 in words is "one billion, six hundred eighty-five million, six hundred eighty-five thousand, six hundred thirty-two".