3685555863 has 16 divisors (see below), whose sum is σ = 5956454400. Its totient is φ = 2233670040.

The previous prime is 3685555859. The next prime is 3685555897.

3685555863 is a `hidden beast` number, since 3 + 6 + 8 + 5 + 55 + 586 + 3 = 666.

3685555863 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 3685555863 - 2² = 3685555859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685555813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6204343 + ... + 6204936.

It is an arithmetic number, because the mean of its divisors is an integer number (372278400).

Almost surely, 2^3685555863 is an apocalyptic number.

3685555863 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3685555863 is a deficient number, since it is larger than the sum of its proper divisors (2270898537).

3685555863 is a wasteful number, since it uses less digits than its factorization.

3685555863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12409299 (or 12409293 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 54.

The square root of 3685555863 is about 60708.7791262516. The cubic root of 3685555863 is about 1544.6650947195.

The spelling of 3685555863 in words is "three billion, six hundred eighty-five million, five hundred fifty-five thousand, eight hundred sixty-three".