246828665021 has 2 divisors, whose sum is σ = 246828665022. Its totient is φ = 246828665020.

The previous prime is 246828665009. The next prime is 246828665023. The reversal of 246828665021 is 120566828642.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245787892900 + 1040772121 = 495770^2 + 32261^2 .

It is a cyclic number.

It is not a de Polignac number, because 246828665021 - 2³⁴ = 229648795837 is a prime.

It is a Sophie Germain prime.

Together with 246828665023, it forms a pair of twin primes.

It is a Chen 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 (246828665023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123414332510 + 123414332511.

It is an arithmetic number, because the mean of its divisors is an integer number (123414332511).

Almost surely, 2^246828665021 is an apocalyptic number.

It is an amenable number.

246828665021 is a deficient number, since it is larger than the sum of its proper divisors (1).

246828665021 is an equidigital number, since it uses as much as digits as its factorization.

246828665021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 246828665021 in words is "two hundred forty-six billion, eight hundred twenty-eight million, six hundred sixty-five thousand, twenty-one".