3649671369569 has 2 divisors, whose sum is σ = 3649671369570. Its totient is φ = 3649671369568.

The previous prime is 3649671369541. The next prime is 3649671369571. The reversal of 3649671369569 is 9659631769463.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3209687233600 + 439984135969 = 1791560^2 + 663313^2 .

It is a cyclic number.

It is not a de Polignac number, because 3649671369569 - 2¹⁶ = 3649671304033 is a prime.

It is a super-2 number, since 2×3649671369569² (a number of 26 digits) contains 22 as substring.

Together with 3649671369571, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3649671369496 and 3649671369505.

It is not a weakly prime, because it can be changed into another prime (3649671366569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1824835684784 + 1824835684785.

It is an arithmetic number, because the mean of its divisors is an integer number (1824835684785).

Almost surely, 2^{3649671369569} is an apocalyptic number.

It is an amenable number.

3649671369569 is a deficient number, since it is larger than the sum of its proper divisors (1).

3649671369569 is an equidigital number, since it uses as much as digits as its factorization.

3649671369569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190427840, while the sum is 74.

The spelling of 3649671369569 in words is "three trillion, six hundred forty-nine billion, six hundred seventy-one million, three hundred sixty-nine thousand, five hundred sixty-nine".