4221642453461 has 2 divisors, whose sum is σ = 4221642453462. Its totient is φ = 4221642453460.

The previous prime is 4221642453443. The next prime is 4221642453517. The reversal of 4221642453461 is 1643542461224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3242542098436 + 979100355025 = 1800706^2 + 989495^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221642453461 - 2¹⁸ = 4221642191317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221642453421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110821226730 + 2110821226731.

It is an arithmetic number, because the mean of its divisors is an integer number (2110821226731).

Almost surely, 2^{4221642453461} is an apocalyptic number.

It is an amenable number.

4221642453461 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221642453461 is an equidigital number, since it uses as much as digits as its factorization.

4221642453461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 44.

The spelling of 4221642453461 in words is "four trillion, two hundred twenty-one billion, six hundred forty-two million, four hundred fifty-three thousand, four hundred sixty-one".