65409442819 has 8 divisors (see below), whose sum is σ = 76492106240. Its totient is φ = 54761393736.

The previous prime is 65409442781. The next prime is 65409442829. The reversal of 65409442819 is 91824490456.

65409442819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 65409442819 - 2¹³ = 65409434627 is a prime.

It is a super-2 number, since 2×65409442819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65409442829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108653259 + ... + 108653860.

It is an arithmetic number, because the mean of its divisors is an integer number (9561513280).

Almost surely, 2^65409442819 is an apocalyptic number.

65409442819 is a deficient number, since it is larger than the sum of its proper divisors (11082663421).

65409442819 is a wasteful number, since it uses less digits than its factorization.

65409442819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217307169.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 65409442819 in words is "sixty-five billion, four hundred nine million, four hundred forty-two thousand, eight hundred nineteen".