64848880309 has 4 divisors (see below), whose sum is σ = 64883431404. Its totient is φ = 64814329216.

The previous prime is 64848880307. The next prime is 64848880363. The reversal of 64848880309 is 90308884846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90308884846 = 2 ⋅45154442423.

It can be written as a sum of positive squares in 2 ways, for example, as 37076657809 + 27772222500 = 192553^2 + 166650^2 .

It is a cyclic number.

It is not a de Polignac number, because 64848880309 - 2¹ = 64848880307 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64848880307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17272732 + ... + 17276485.

It is an arithmetic number, because the mean of its divisors is an integer number (16220857851).

Almost surely, 2^64848880309 is an apocalyptic number.

It is an amenable number.

64848880309 is a deficient number, since it is larger than the sum of its proper divisors (34551095).

64848880309 is a wasteful number, since it uses less digits than its factorization.

64848880309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34551094.

The product of its (nonzero) digits is 10616832, while the sum is 58.

The spelling of 64848880309 in words is "sixty-four billion, eight hundred forty-eight million, eight hundred eighty thousand, three hundred nine".