7957933052821 has 2 divisors, whose sum is σ = 7957933052822. Its totient is φ = 7957933052820.

The previous prime is 7957933052809. The next prime is 7957933052837. The reversal of 7957933052821 is 1282503397597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5335845903025 + 2622087149796 = 2309945^2 + 1619286^2 .

It is a cyclic number.

It is not a de Polignac number, because 7957933052821 - 2¹⁷ = 7957932921749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7957933052821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7957933052021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3978966526410 + 3978966526411.

It is an arithmetic number, because the mean of its divisors is an integer number (3978966526411).

Almost surely, 2^{7957933052821} is an apocalyptic number.

It is an amenable number.

7957933052821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7957933052821 is an equidigital number, since it uses as much as digits as its factorization.

7957933052821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28576800, while the sum is 61.

The spelling of 7957933052821 in words is "seven trillion, nine hundred fifty-seven billion, nine hundred thirty-three million, fifty-two thousand, eight hundred twenty-one".