6344669899821 has 32 divisors (see below), whose sum is σ = 9263642167296. Its totient is φ = 3830661072000.

The previous prime is 6344669899811. The next prime is 6344669899859. The reversal of 6344669899821 is 1289989664436.

It is not a de Polignac number, because 6344669899821 - 2²³ = 6344661511213 is a prime.

It is a super-2 number, since 2×6344669899821² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6344669899811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99512665 + ... + 99576401.

It is an arithmetic number, because the mean of its divisors is an integer number (289488817728).

Almost surely, 2^{6344669899821} is an apocalyptic number.

It is an amenable number.

6344669899821 is a deficient number, since it is larger than the sum of its proper divisors (2918972267475).

6344669899821 is a wasteful number, since it uses less digits than its factorization.

6344669899821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75153.

The product of its digits is 967458816, while the sum is 75.

The spelling of 6344669899821 in words is "six trillion, three hundred forty-four billion, six hundred sixty-nine million, eight hundred ninety-nine thousand, eight hundred twenty-one".