6631861836 has 24 divisors (see below), whose sum is σ = 15486366784. Its totient is φ = 2208903120.

The previous prime is 6631861813. The next prime is 6631861843. The reversal of 6631861836 is 6381681366.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198550 + ... + 229533.

Almost surely, 2^6631861836 is an apocalyptic number.

It is an amenable number.

6631861836 is an abundant number, since it is smaller than the sum of its proper divisors (8854504948).

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

6631861836 is a wasteful number, since it uses less digits than its factorization.

6631861836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429381 (or 429379 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 6631861836 is about 81436.2439949191. The cubic root of 6631861836 is about 1878.7910814657.

The spelling of 6631861836 in words is "six billion, six hundred thirty-one million, eight hundred sixty-one thousand, eight hundred thirty-six".