1865912864 has 12 divisors (see below), whose sum is σ = 3673516014. Its totient is φ = 932956416.

The previous prime is 1865912863. The next prime is 1865912921. The reversal of 1865912864 is 4682195681.

It can be written as a sum of positive squares in only one way, i.e., 1738222864 + 127690000 = 41692^2 + 11300^2 .

It is not an unprimeable number, because it can be changed into a prime (1865912861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29154857 + ... + 29154920.

Almost surely, 2^1865912864 is an apocalyptic number.

It is an amenable number.

1865912864 is a deficient number, since it is larger than the sum of its proper divisors (1807603150).

1865912864 is an equidigital number, since it uses as much as digits as its factorization.

1865912864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58309787 (or 58309779 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

The square root of 1865912864 is about 43196.2135377628. The cubic root of 1865912864 is about 1231.1107387857.

The spelling of 1865912864 in words is "one billion, eight hundred sixty-five million, nine hundred twelve thousand, eight hundred sixty-four".