7897452548021 has 2 divisors, whose sum is σ = 7897452548022. Its totient is φ = 7897452548020.

The previous prime is 7897452547987. The next prime is 7897452548039. The reversal of 7897452548021 is 1208452547987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7796464606225 + 100987941796 = 2792215^2 + 317786^2 .

It is a cyclic number.

It is not a de Polignac number, because 7897452548021 - 2¹⁴ = 7897452531637 is a prime.

It is a super-2 number, since 2×7897452548021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7897452541021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3948726274010 + 3948726274011.

It is an arithmetic number, because the mean of its divisors is an integer number (3948726274011).

Almost surely, 2^{7897452548021} is an apocalyptic number.

It is an amenable number.

7897452548021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7897452548021 is an equidigital number, since it uses as much as digits as its factorization.

7897452548021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45158400, while the sum is 62.

The spelling of 7897452548021 in words is "seven trillion, eight hundred ninety-seven billion, four hundred fifty-two million, five hundred forty-eight thousand, twenty-one".