19216017617 has 2 divisors, whose sum is σ = 19216017618. Its totient is φ = 19216017616.

The previous prime is 19216017571. The next prime is 19216017641. The reversal of 19216017617 is 71671061291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17613536656 + 1602480961 = 132716^2 + 40031^2 .

It is a cyclic number.

It is not a de Polignac number, because 19216017617 - 2¹⁸ = 19215755473 is a prime.

It is not a weakly prime, because it can be changed into another prime (19216017817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9608008808 + 9608008809.

It is an arithmetic number, because the mean of its divisors is an integer number (9608008809).

Almost surely, 2^19216017617 is an apocalyptic number.

It is an amenable number.

19216017617 is a deficient number, since it is larger than the sum of its proper divisors (1).

19216017617 is an equidigital number, since it uses as much as digits as its factorization.

19216017617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The spelling of 19216017617 in words is "nineteen billion, two hundred sixteen million, seventeen thousand, six hundred seventeen".