6339869970821 has 8 divisors (see below), whose sum is σ = 6565954639104. Its totient is φ = 6117585045040.

The previous prime is 6339869970803. The next prime is 6339869970823. The reversal of 6339869970821 is 1280799689336.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6339869970821 - 2¹⁸ = 6339869708677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6339869970823) 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 7 ways as a sum of consecutive naturals, for example, 949932230 + ... + 949938903.

It is an arithmetic number, because the mean of its divisors is an integer number (820744329888).

Almost surely, 2^{6339869970821} is an apocalyptic number.

It is an amenable number.

6339869970821 is a deficient number, since it is larger than the sum of its proper divisors (226084668283).

6339869970821 is a wasteful number, since it uses less digits than its factorization.

6339869970821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899871251.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 6339869970821 in words is "six trillion, three hundred thirty-nine billion, eight hundred sixty-nine million, nine hundred seventy thousand, eight hundred twenty-one".