2478425444021 has 2 divisors, whose sum is σ = 2478425444022. Its totient is φ = 2478425444020.

The previous prime is 2478425443969. The next prime is 2478425444129. The reversal of 2478425444021 is 1204445248742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1572292795921 + 906132648100 = 1253911^2 + 951910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478425444021 - 2¹⁴ = 2478425427637 is a prime.

It is a super-2 number, since 2×2478425444021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478425444821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239212722010 + 1239212722011.

It is an arithmetic number, because the mean of its divisors is an integer number (1239212722011).

Almost surely, 2^{2478425444021} is an apocalyptic number.

It is an amenable number.

2478425444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478425444021 is an equidigital number, since it uses as much as digits as its factorization.

2478425444021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2293760, while the sum is 47.

The spelling of 2478425444021 in words is "two trillion, four hundred seventy-eight billion, four hundred twenty-five million, four hundred forty-four thousand, twenty-one".