3631531866 has 16 divisors (see below), whose sum is σ = 7293456000. Its totient is φ = 1205445248.

The previous prime is 3631531793. The next prime is 3631531867. The reversal of 3631531866 is 6681351363.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3631531867) 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 in 7 ways as a sum of consecutive naturals, for example, 1264791 + ... + 1267658.

It is an arithmetic number, because the mean of its divisors is an integer number (455841000).

Almost surely, 2^3631531866 is an apocalyptic number.

3631531866 is an abundant number, since it is smaller than the sum of its proper divisors (3661924134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3631531866 is a wasteful number, since it uses less digits than its factorization.

3631531866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532693.

The product of its digits is 233280, while the sum is 42.

The square root of 3631531866 is about 60262.1926750098. The cubic root of 3631531866 is about 1537.0805241266.

The spelling of 3631531866 in words is "three billion, six hundred thirty-one million, five hundred thirty-one thousand, eight hundred sixty-six".