6336400921 has 2 divisors, whose sum is σ = 6336400922. Its totient is φ = 6336400920.

The previous prime is 6336400901. The next prime is 6336400951. The reversal of 6336400921 is 1290046336.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3886150921 + 2450250000 = 62339^2 + 49500^2 .

It is a cyclic number.

It is not a de Polignac number, because 6336400921 - 2²¹ = 6334303769 is a prime.

It is not a weakly prime, because it can be changed into another prime (6336400901) 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 as a sum of consecutive naturals, namely, 3168200460 + 3168200461.

It is an arithmetic number, because the mean of its divisors is an integer number (3168200461).

Almost surely, 2^6336400921 is an apocalyptic number.

It is an amenable number.

6336400921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6336400921 is an equidigital number, since it uses as much as digits as its factorization.

6336400921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 6336400921 is about 79601.5133084793. The cubic root of 6336400921 is about 1850.4650324503.

The spelling of 6336400921 in words is "six billion, three hundred thirty-six million, four hundred thousand, nine hundred twenty-one".