3845177658869 has 2 divisors, whose sum is σ = 3845177658870. Its totient is φ = 3845177658868.

The previous prime is 3845177658857. The next prime is 3845177658871. The reversal of 3845177658869 is 9688567715483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3679345458244 + 165832200625 = 1918162^2 + 407225^2 .

It is an emirp because it is prime and its reverse (9688567715483) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3845177658869 is a prime.

It is a super-2 number, since 2×3845177658869² (a number of 26 digits) contains 22 as substring.

Together with 3845177658871, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3845177658869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3845177657869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922588829434 + 1922588829435.

It is an arithmetic number, because the mean of its divisors is an integer number (1922588829435).

Almost surely, 2^{3845177658869} is an apocalyptic number.

It is an amenable number.

3845177658869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3845177658869 is an equidigital number, since it uses as much as digits as its factorization.

3845177658869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2438553600, while the sum is 77.

The spelling of 3845177658869 in words is "three trillion, eight hundred forty-five billion, one hundred seventy-seven million, six hundred fifty-eight thousand, eight hundred sixty-nine".