4821638791273 has 2 divisors, whose sum is σ = 4821638791274. Its totient is φ = 4821638791272.

The previous prime is 4821638791261. The next prime is 4821638791391. The reversal of 4821638791273 is 3721978361284.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4666688703504 + 154950087769 = 2160252^2 + 393637^2 .

It is a cyclic number.

It is not a de Polignac number, because 4821638791273 - 2⁵ = 4821638791241 is a prime.

It is not a weakly prime, because it can be changed into another prime (4821638797273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2410819395636 + 2410819395637.

It is an arithmetic number, because the mean of its divisors is an integer number (2410819395637).

Almost surely, 2^{4821638791273} is an apocalyptic number.

It is an amenable number.

4821638791273 is a deficient number, since it is larger than the sum of its proper divisors (1).

4821638791273 is an equidigital number, since it uses as much as digits as its factorization.

4821638791273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The spelling of 4821638791273 in words is "four trillion, eight hundred twenty-one billion, six hundred thirty-eight million, seven hundred ninety-one thousand, two hundred seventy-three".