3685662756869 has 2 divisors, whose sum is σ = 3685662756870. Its totient is φ = 3685662756868.

The previous prime is 3685662756857. The next prime is 3685662756901. The reversal of 3685662756869 is 9686572665863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3211038211969 + 474624544900 = 1791937^2 + 688930^2 .

It is a cyclic number.

It is not a de Polignac number, because 3685662756869 - 2⁸ = 3685662756613 is a prime.

It is a super-2 number, since 2×3685662756869² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3685662756869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685662755869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842831378434 + 1842831378435.

It is an arithmetic number, because the mean of its divisors is an integer number (1842831378435).

Almost surely, 2^{3685662756869} is an apocalyptic number.

It is an amenable number.

3685662756869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685662756869 is an equidigital number, since it uses as much as digits as its factorization.

3685662756869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4702924800, while the sum is 77.

The spelling of 3685662756869 in words is "three trillion, six hundred eighty-five billion, six hundred sixty-two million, seven hundred fifty-six thousand, eight hundred sixty-nine".