1685048544 has 72 divisors (see below), whose sum is σ = 4812614352. Its totient is φ = 559249920.

The previous prime is 1685048543. The next prime is 1685048579. The reversal of 1685048544 is 4458405861.

It is a happy number.

1685048544 is a `hidden beast` number, since 1 + 68 + 5 + 0 + 48 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1685048544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685048543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54549 + ... + 79659.

It is an arithmetic number, because the mean of its divisors is an integer number (66841866).

Almost surely, 2^1685048544 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 1685048544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2406307176).

1685048544 is an abundant number, since it is smaller than the sum of its proper divisors (3127565808).

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

1685048544 is a wasteful number, since it uses less digits than its factorization.

1685048544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25360 (or 25349 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The square root of 1685048544 is about 41049.3427962008. The cubic root of 1685048544 is about 1189.9739993848.

The spelling of 1685048544 in words is "one billion, six hundred eighty-five million, forty-eight thousand, five hundred forty-four".