19288601661 has 8 divisors (see below), whose sum is σ = 29392154944. Its totient is φ = 11022058080.

The previous prime is 19288601641. The next prime is 19288601669. The reversal of 19288601661 is 16610688291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19288601661 - 2¹⁰ = 19288600637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19288601661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19288601669) 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 in 7 ways as a sum of consecutive naturals, for example, 459252400 + ... + 459252441.

It is an arithmetic number, because the mean of its divisors is an integer number (3674019368).

Almost surely, 2^19288601661 is an apocalyptic number.

It is an amenable number.

19288601661 is a deficient number, since it is larger than the sum of its proper divisors (10103553283).

19288601661 is an equidigital number, since it uses as much as digits as its factorization.

19288601661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918504851.

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 19288601661 in words is "nineteen billion, two hundred eighty-eight million, six hundred one thousand, six hundred sixty-one".