6838437719421 has 24 divisors (see below), whose sum is σ = 12315108621504. Its totient is φ = 3552435178560.

The previous prime is 6838437719411. The next prime is 6838437719429. The reversal of 6838437719421 is 1249177348386.

6838437719421 is a `hidden beast` number, since 6 + 8 + 3 + 8 + 437 + 7 + 194 + 2 + 1 = 666.

It is not a de Polignac number, because 6838437719421 - 2¹⁰ = 6838437718397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6838437719429) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4933937056 + ... + 4933938441.

It is an arithmetic number, because the mean of its divisors is an integer number (513129525896).

Almost surely, 2^{6838437719421} is an apocalyptic number.

It is an amenable number.

6838437719421 is a deficient number, since it is larger than the sum of its proper divisors (5476670902083).

6838437719421 is a wasteful number, since it uses less digits than its factorization.

6838437719421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9867875521 (or 9867875518 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 6838437719421 in words is "six trillion, eight hundred thirty-eight billion, four hundred thirty-seven million, seven hundred nineteen thousand, four hundred twenty-one".