1865411841 has 16 divisors (see below), whose sum is σ = 2497628160. Its totient is φ = 1238413440.

The previous prime is 1865411839. The next prime is 1865411861. The reversal of 1865411841 is 1481145681.

It is not a de Polignac number, because 1865411841 - 2¹ = 1865411839 is a prime.

It is a super-2 number, since 2×1865411841² = 6959522673086018562, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1865411841.

It is not an unprimeable number, because it can be changed into a prime (1865411861) 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, 1411461 + ... + 1412781.

It is an arithmetic number, because the mean of its divisors is an integer number (156101760).

Almost surely, 2^1865411841 is an apocalyptic number.

It is an amenable number.

1865411841 is a deficient number, since it is larger than the sum of its proper divisors (632216319).

1865411841 is a wasteful number, since it uses less digits than its factorization.

1865411841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its digits is 30720, while the sum is 39.

The square root of 1865411841 is about 43190.4137627784. The cubic root of 1865411841 is about 1231.0005389253. Note that the first 3 decimals are identical.

The spelling of 1865411841 in words is "one billion, eight hundred sixty-five million, four hundred eleven thousand, eight hundred forty-one".