65284689649 has 4 divisors (see below), whose sum is σ = 65569775860. Its totient is φ = 64999603440.

The previous prime is 65284689647. The next prime is 65284689703. The reversal of 65284689649 is 94698648256.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63500472049 + 1784217600 = 251993^2 + 42240^2 .

It is a cyclic number.

It is not a de Polignac number, because 65284689649 - 2¹ = 65284689647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65284689647) 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, 142542762 + ... + 142543219.

It is an arithmetic number, because the mean of its divisors is an integer number (16392443965).

Almost surely, 2^65284689649 is an apocalyptic number.

It is an amenable number.

65284689649 is a deficient number, since it is larger than the sum of its proper divisors (285086211).

65284689649 is a wasteful number, since it uses less digits than its factorization.

65284689649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285086210.

The product of its digits is 179159040, while the sum is 67.

The spelling of 65284689649 in words is "sixty-five billion, two hundred eighty-four million, six hundred eighty-nine thousand, six hundred forty-nine".