3986431798650 has 192 divisors, whose sum is σ = 11772172247040. Its totient is φ = 873549561600.

The previous prime is 3986431798649. The next prime is 3986431798693. The reversal of 3986431798650 is 568971346893.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2910556 + ... + 4055144.

It is an arithmetic number, because the mean of its divisors is an integer number (61313397120).

Almost surely, 2^{3986431798650} is an apocalyptic number.

3986431798650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3986431798650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5886086123520).

3986431798650 is an abundant number, since it is smaller than the sum of its proper divisors (7785740448390).

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

3986431798650 is a wasteful number, since it uses less digits than its factorization.

3986431798650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144749 (or 1144744 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 69.

The spelling of 3986431798650 in words is "three trillion, nine hundred eighty-six billion, four hundred thirty-one million, seven hundred ninety-eight thousand, six hundred fifty".