621619190219 has 2 divisors, whose sum is σ = 621619190220. Its totient is φ = 621619190218.

The previous prime is 621619190209. The next prime is 621619190263. The reversal of 621619190219 is 912091916126.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621619190219 is a prime.

It is a super-2 number, since 2×621619190219² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621619190209) 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, 310809595109 + 310809595110.

It is an arithmetic number, because the mean of its divisors is an integer number (310809595110).

Almost surely, 2^621619190219 is an apocalyptic number.

621619190219 is a deficient number, since it is larger than the sum of its proper divisors (1).

621619190219 is an equidigital number, since it uses as much as digits as its factorization.

621619190219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 621619190219 in words is "six hundred twenty-one billion, six hundred nineteen million, one hundred ninety thousand, two hundred nineteen".