6401839133 has 2 divisors, whose sum is σ = 6401839134. Its totient is φ = 6401839132.

The previous prime is 6401839127. The next prime is 6401839187. The reversal of 6401839133 is 3319381046.

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., 4871621209 + 1530217924 = 69797^2 + 39118^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401839133 - 2⁶ = 6401839069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401839033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200919566 + 3200919567.

It is an arithmetic number, because the mean of its divisors is an integer number (3200919567).

Almost surely, 2^6401839133 is an apocalyptic number.

It is an amenable number.

6401839133 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401839133 is an equidigital number, since it uses as much as digits as its factorization.

6401839133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6401839133 is about 80011.4937555849. The cubic root of 6401839133 is about 1856.8133601458.

The spelling of 6401839133 in words is "six billion, four hundred one million, eight hundred thirty-nine thousand, one hundred thirty-three".