3644869181 has 2 divisors, whose sum is σ = 3644869182. Its totient is φ = 3644869180.

The previous prime is 3644869171. The next prime is 3644869183. The reversal of 3644869181 is 1819684463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2490908281 + 1153960900 = 49909^2 + 33970^2 .

It is an emirp because it is prime and its reverse (1819684463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3644869181 - 2⁶ = 3644869117 is a prime.

It is a super-2 number, since 2×3644869181² = 26570142693207221522, which contains 22 as substring.

Together with 3644869183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3644869183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822434590 + 1822434591.

It is an arithmetic number, because the mean of its divisors is an integer number (1822434591).

Almost surely, 2^3644869181 is an apocalyptic number.

It is an amenable number.

3644869181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644869181 is an equidigital number, since it uses as much as digits as its factorization.

3644869181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The square root of 3644869181 is about 60372.7519747112. The cubic root of 3644869181 is about 1538.9599404848.

The spelling of 3644869181 in words is "three billion, six hundred forty-four million, eight hundred sixty-nine thousand, one hundred eighty-one".