65034840649 has 4 divisors (see below), whose sum is σ = 65858066560. Its totient is φ = 64211614740.

The previous prime is 65034840601. The next prime is 65034840691. The reversal of 65034840649 is 94604843056.

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 a de Polignac number, because none of the positive numbers 2^k-65034840649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65034840349) 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, 411612837 + ... + 411612994.

It is an arithmetic number, because the mean of its divisors is an integer number (16464516640).

Almost surely, 2^65034840649 is an apocalyptic number.

It is an amenable number.

65034840649 is a deficient number, since it is larger than the sum of its proper divisors (823225911).

65034840649 is an equidigital number, since it uses as much as digits as its factorization.

65034840649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823225910.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 65034840649 in words is "sixty-five billion, thirty-four million, eight hundred forty thousand, six hundred forty-nine".