642204453419 has 2 divisors, whose sum is σ = 642204453420. Its totient is φ = 642204453418.

The previous prime is 642204453409. The next prime is 642204453461. The reversal of 642204453419 is 914354402246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642204453419 - 2¹² = 642204449323 is a prime.

It is a super-2 number, since 2×642204453419² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642204453419.

It is not a weakly prime, because it can be changed into another prime (642204453409) 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, 321102226709 + 321102226710.

It is an arithmetic number, because the mean of its divisors is an integer number (321102226710).

Almost surely, 2^642204453419 is an apocalyptic number.

642204453419 is a deficient number, since it is larger than the sum of its proper divisors (1).

642204453419 is an equidigital number, since it uses as much as digits as its factorization.

642204453419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 642204453419 in words is "six hundred forty-two billion, two hundred four million, four hundred fifty-three thousand, four hundred nineteen".