1685255000 has 160 divisors (see below), whose sum is σ = 4640826960. Its totient is φ = 565440000.

The previous prime is 1685254973. The next prime is 1685255009. The reversal of 1685255000 is 5525861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685255009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 713822 + ... + 716178.

Almost surely, 2^1685255000 is an apocalyptic number.

1685255000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685255000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2320413480).

1685255000 is an abundant number, since it is smaller than the sum of its proper divisors (2955571960).

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

1685255000 is a wasteful number, since it uses less digits than its factorization.

1685255000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1685255000 is about 41051.8574488415. The cubic root of 1685255000 is about 1190.0225968451.

The spelling of 1685255000 in words is "one billion, six hundred eighty-five million, two hundred fifty-five thousand".