6344669899820 has 432 divisors, whose sum is σ = 16988650408800. Its totient is φ = 1977592651776.

The previous prime is 6344669899811. The next prime is 6344669899859. The reversal of 6344669899820 is 289989664436.

It is a super-2 number, since 2×6344669899820² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (74).

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 143 ways as a sum of consecutive naturals, for example, 3398322527 + ... + 3398324393.

It is an arithmetic number, because the mean of its divisors is an integer number (39325579650).

Almost surely, 2^{6344669899820} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6344669899820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8494325204400).

6344669899820 is an abundant number, since it is smaller than the sum of its proper divisors (10643980508980).

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

6344669899820 is a wasteful number, since it uses less digits than its factorization.

6344669899820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130 (or 2084 counting only the distinct ones).

The product of its (nonzero) digits is 967458816, while the sum is 74.

The spelling of 6344669899820 in words is "six trillion, three hundred forty-four billion, six hundred sixty-nine million, eight hundred ninety-nine thousand, eight hundred twenty".