1626244603421 has 2 divisors, whose sum is σ = 1626244603422. Its totient is φ = 1626244603420.

The previous prime is 1626244603411. The next prime is 1626244603439. The reversal of 1626244603421 is 1243064426261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948405247321 + 677839356100 = 973861^2 + 823310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1626244603421 - 2³⁰ = 1625170861597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1626244603411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813122301710 + 813122301711.

It is an arithmetic number, because the mean of its divisors is an integer number (813122301711).

Almost surely, 2^{1626244603421} is an apocalyptic number.

It is an amenable number.

1626244603421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1626244603421 is an equidigital number, since it uses as much as digits as its factorization.

1626244603421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 1626244603421 in words is "one trillion, six hundred twenty-six billion, two hundred forty-four million, six hundred three thousand, four hundred twenty-one".