3618509685 has 32 divisors (see below), whose sum is σ = 6648102912. Its totient is φ = 1646326080.

The previous prime is 3618509639. The next prime is 3618509747. The reversal of 3618509685 is 5869058163.

It is not a de Polignac number, because 3618509685 - 2⁶ = 3618509621 is a prime.

It is a super-2 number, since 2×3618509685² = 26187224680877598450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59509 + ... + 103818.

It is an arithmetic number, because the mean of its divisors is an integer number (207753216).

Almost surely, 2^3618509685 is an apocalyptic number.

3618509685 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3618509685 is a deficient number, since it is larger than the sum of its proper divisors (3029593227).

3618509685 is a wasteful number, since it uses less digits than its factorization.

3618509685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163553.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 3618509685 is about 60154.0496143028. The cubic root of 3618509685 is about 1535.2410695595.

The spelling of 3618509685 in words is "three billion, six hundred eighteen million, five hundred nine thousand, six hundred eighty-five".