65679544019 has 2 divisors, whose sum is σ = 65679544020. Its totient is φ = 65679544018.

The previous prime is 65679544009. The next prime is 65679544031. The reversal of 65679544019 is 91044597656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65679544019 - 2⁴ = 65679544003 is a prime.

It is a super-2 number, since 2×65679544019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65679544009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32839772009 + 32839772010.

It is an arithmetic number, because the mean of its divisors is an integer number (32839772010).

Almost surely, 2^65679544019 is an apocalyptic number.

65679544019 is a deficient number, since it is larger than the sum of its proper divisors (1).

65679544019 is an equidigital number, since it uses as much as digits as its factorization.

65679544019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 65679544019 in words is "sixty-five billion, six hundred seventy-nine million, five hundred forty-four thousand, nineteen".