6838176214921 has 2 divisors, whose sum is σ = 6838176214922. Its totient is φ = 6838176214920.

The previous prime is 6838176214907. The next prime is 6838176214963. The reversal of 6838176214921 is 1294126718386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6395234054400 + 442942160521 = 2528880^2 + 665539^2 .

It is a cyclic number.

It is not a de Polignac number, because 6838176214921 - 2⁹ = 6838176214409 is a prime.

It is a super-2 number, since 2×6838176214921² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6838176214901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3419088107460 + 3419088107461.

It is an arithmetic number, because the mean of its divisors is an integer number (3419088107461).

Almost surely, 2^{6838176214921} is an apocalyptic number.

It is an amenable number.

6838176214921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6838176214921 is an equidigital number, since it uses as much as digits as its factorization.

6838176214921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 58.

The spelling of 6838176214921 in words is "six trillion, eight hundred thirty-eight billion, one hundred seventy-six million, two hundred fourteen thousand, nine hundred twenty-one".