19141015561 has 4 divisors (see below), whose sum is σ = 19502166852. Its totient is φ = 18779864272.

The previous prime is 19141015559. The next prime is 19141015567. The reversal of 19141015561 is 16551014191.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16551014191 = 2129 ⋅7774079.

It can be written as a sum of positive squares in 2 ways, for example, as 14800182336 + 4340833225 = 121656^2 + 65885^2 .

It is a cyclic number.

It is not a de Polignac number, because 19141015561 - 2¹ = 19141015559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19141015567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180575566 + ... + 180575671.

It is an arithmetic number, because the mean of its divisors is an integer number (4875541713).

Almost surely, 2^19141015561 is an apocalyptic number.

It is an amenable number.

19141015561 is a deficient number, since it is larger than the sum of its proper divisors (361151291).

19141015561 is an equidigital number, since it uses as much as digits as its factorization.

19141015561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361151290.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 19141015561 in words is "nineteen billion, one hundred forty-one million, fifteen thousand, five hundred sixty-one".