7426401362221 has 2 divisors, whose sum is σ = 7426401362222. Its totient is φ = 7426401362220.

The previous prime is 7426401362213. The next prime is 7426401362251. The reversal of 7426401362221 is 1222631046247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6828657448900 + 597743913321 = 2613170^2 + 773139^2 .

It is a cyclic number.

It is not a de Polignac number, because 7426401362221 - 2³ = 7426401362213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7426401362251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3713200681110 + 3713200681111.

It is an arithmetic number, because the mean of its divisors is an integer number (3713200681111).

Almost surely, 2^{7426401362221} is an apocalyptic number.

It is an amenable number.

7426401362221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7426401362221 is an equidigital number, since it uses as much as digits as its factorization.

7426401362221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 7426401362221 in words is "seven trillion, four hundred twenty-six billion, four hundred one million, three hundred sixty-two thousand, two hundred twenty-one".