19410065509 has 4 divisors (see below), whose sum is σ = 19558234080. Its totient is φ = 19261896940.

The previous prime is 19410065497. The next prime is 19410065533. The reversal of 19410065509 is 90556001491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90556001491 = 59669 ⋅1517639.

It is a cyclic number.

It is not a de Polignac number, because 19410065509 - 2²³ = 19401676901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19410065569) 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, 74084089 + ... + 74084350.

It is an arithmetic number, because the mean of its divisors is an integer number (4889558520).

Almost surely, 2^19410065509 is an apocalyptic number.

It is an amenable number.

19410065509 is a deficient number, since it is larger than the sum of its proper divisors (148168571).

19410065509 is a wasteful number, since it uses less digits than its factorization.

19410065509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148168570.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 19410065509 in words is "nineteen billion, four hundred ten million, sixty-five thousand, five hundred nine".