3685685631 has 8 divisors (see below), whose sum is σ = 4957736880. Its totient is φ = 2435379072.

The previous prime is 3685685609. The next prime is 3685685659. The reversal of 3685685631 is 1365865863.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3685685631 - 2⁷ = 3685685503 is a prime.

It is a super-2 number, since 2×3685685631² = 27168557141119736322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685685231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5435776 + ... + 5436453.

It is an arithmetic number, because the mean of its divisors is an integer number (619717110).

Almost surely, 2^3685685631 is an apocalyptic number.

3685685631 is a deficient number, since it is larger than the sum of its proper divisors (1272051249).

3685685631 is a wasteful number, since it uses less digits than its factorization.

3685685631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10872345.

The product of its digits is 3110400, while the sum is 51.

The square root of 3685685631 is about 60709.8478914253. The cubic root of 3685685631 is about 1544.6832236672.

The spelling of 3685685631 in words is "three billion, six hundred eighty-five million, six hundred eighty-five thousand, six hundred thirty-one".