1861568852 has 96 divisors (see below), whose sum is σ = 4070277120. Its totient is φ = 732343680.

The previous prime is 1861568851. The next prime is 1861568881. The reversal of 1861568852 is 2588651681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1861568852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861568851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1118573 + ... + 1120235.

It is an arithmetic number, because the mean of its divisors is an integer number (42398720).

Almost surely, 2^1861568852 is an apocalyptic number.

It is an amenable number.

1861568852 is an abundant number, since it is smaller than the sum of its proper divisors (2208708268).

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

1861568852 is a wasteful number, since it uses less digits than its factorization.

1861568852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813 (or 1811 counting only the distinct ones).

The product of its digits is 921600, while the sum is 50.

The square root of 1861568852 is about 43145.9019143186. The cubic root of 1861568852 is about 1230.1546177938.

The spelling of 1861568852 in words is "one billion, eight hundred sixty-one million, five hundred sixty-eight thousand, eight hundred fifty-two".