6396681900 has 72 divisors (see below), whose sum is σ = 21151701760. Its totient is φ = 1462098240.

The previous prime is 6396681859. The next prime is 6396681901. The reversal of 6396681900 is 91866936.

It is a super-2 number, since 2×6396681900² = 81835078659575220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6396681900.

It is not an unprimeable number, because it can be changed into a prime (6396681901) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1520920 + ... + 1525119.

Almost surely, 2^6396681900 is an apocalyptic number.

6396681900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6396681900 is an abundant number, since it is smaller than the sum of its proper divisors (14755019860).

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

6396681900 is a wasteful number, since it uses less digits than its factorization.

6396681900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046063 (or 3046056 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 6396681900 is about 79979.2591863666. The cubic root of 6396681900 is about 1856.3146184808.

The spelling of 6396681900 in words is "six billion, three hundred ninety-six million, six hundred eighty-one thousand, nine hundred".