65648461936849 has 4 divisors (see below), whose sum is σ = 71616503931120. Its totient is φ = 59680419942580.

The previous prime is 65648461936831. The next prime is 65648461936853. The reversal of 65648461936849 is 94863916484656.

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.

It is a cyclic number.

It is not a de Polignac number, because 65648461936849 - 2¹⁷ = 65648461805777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65648461933849) 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, 2984020997119 + ... + 2984020997140.

It is an arithmetic number, because the mean of its divisors is an integer number (17904125982780).

Almost surely, 2^{65648461936849} is an apocalyptic number.

It is an amenable number.

65648461936849 is a deficient number, since it is larger than the sum of its proper divisors (5968041994271).

65648461936849 is a wasteful number, since it uses less digits than its factorization.

65648461936849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968041994270.

The product of its digits is 6449725440, while the sum is 79.

The spelling of 65648461936849 in words is "sixty-five trillion, six hundred forty-eight billion, four hundred sixty-one million, nine hundred thirty-six thousand, eight hundred forty-nine".