1865912288213 has 2 divisors, whose sum is σ = 1865912288214. Its totient is φ = 1865912288212.

The previous prime is 1865912288183. The next prime is 1865912288293. The reversal of 1865912288213 is 3128822195681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003729470769 + 862182817444 = 1001863^2 + 928538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1865912288213 - 2²² = 1865908093909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1865912288293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932956144106 + 932956144107.

It is an arithmetic number, because the mean of its divisors is an integer number (932956144107).

Almost surely, 2^{1865912288213} is an apocalyptic number.

It is an amenable number.

1865912288213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865912288213 is an equidigital number, since it uses as much as digits as its factorization.

1865912288213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 56.

The spelling of 1865912288213 in words is "one trillion, eight hundred sixty-five billion, nine hundred twelve million, two hundred eighty-eight thousand, two hundred thirteen".