19616244469 has 2 divisors, whose sum is σ = 19616244470. Its totient is φ = 19616244468.

The previous prime is 19616244463. The next prime is 19616244481. The reversal of 19616244469 is 96444261691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13635232900 + 5981011569 = 116770^2 + 77337^2 .

It is a cyclic number.

It is not a de Polignac number, because 19616244469 - 2¹⁷ = 19616113397 is a prime.

It is a super-2 number, since 2×19616244469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19616244463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9808122234 + 9808122235.

It is an arithmetic number, because the mean of its divisors is an integer number (9808122235).

Almost surely, 2^19616244469 is an apocalyptic number.

It is an amenable number.

19616244469 is a deficient number, since it is larger than the sum of its proper divisors (1).

19616244469 is an equidigital number, since it uses as much as digits as its factorization.

19616244469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 52.

The spelling of 19616244469 in words is "nineteen billion, six hundred sixteen million, two hundred forty-four thousand, four hundred sixty-nine".