3685885517 has 2 divisors, whose sum is σ = 3685885518. Its totient is φ = 3685885516.

The previous prime is 3685885513. The next prime is 3685885537. The reversal of 3685885517 is 7155885863.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2382025636 + 1303859881 = 48806^2 + 36109^2 .

It is a cyclic number.

It is not a de Polignac number, because 3685885517 - 2² = 3685885513 is a prime.

It is a super-3 number, since 3×3685885517³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685885513) 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, 1842942758 + 1842942759.

It is an arithmetic number, because the mean of its divisors is an integer number (1842942759).

Almost surely, 2^3685885517 is an apocalyptic number.

It is an amenable number.

3685885517 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685885517 is an equidigital number, since it uses as much as digits as its factorization.

3685885517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064000, while the sum is 56.

The square root of 3685885517 is about 60711.4941094353. The cubic root of 3685885517 is about 1544.7111474603.

It can be divided in two parts, 368 and 5885517, that added together give a palindrome (5885885).

The spelling of 3685885517 in words is "three billion, six hundred eighty-five million, eight hundred eighty-five thousand, five hundred seventeen".