3864661753873 has 2 divisors, whose sum is σ = 3864661753874. Its totient is φ = 3864661753872.

The previous prime is 3864661753871. The next prime is 3864661753991. The reversal of 3864661753873 is 3783571664683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3267392453649 + 597269300224 = 1807593^2 + 772832^2 .

It is a cyclic number.

It is not a de Polignac number, because 3864661753873 - 2¹ = 3864661753871 is a prime.

It is a super-2 number, since 2×3864661753873² (a number of 26 digits) contains 22 as substring.

Together with 3864661753871, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3864661753799 and 3864661753808.

It is not a weakly prime, because it can be changed into another prime (3864661753871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932330876936 + 1932330876937.

It is an arithmetic number, because the mean of its divisors is an integer number (1932330876937).

Almost surely, 2^{3864661753873} is an apocalyptic number.

It is an amenable number.

3864661753873 is a deficient number, since it is larger than the sum of its proper divisors (1).

3864661753873 is an equidigital number, since it uses as much as digits as its factorization.

3864661753873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 365783040, while the sum is 67.

The spelling of 3864661753873 in words is "three trillion, eight hundred sixty-four billion, six hundred sixty-one million, seven hundred fifty-three thousand, eight hundred seventy-three".