64986882805 has 8 divisors (see below), whose sum is σ = 83983048632. Its totient is φ = 47990313408.

The previous prime is 64986882803. The next prime is 64986882817. The reversal of 64986882805 is 50828868946.

It can be written as a sum of positive squares in 4 ways, for example, as 2143412209 + 62843470596 = 46297^2 + 250686^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64986882805 - 2¹ = 64986882803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64986882803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499899034 + ... + 499899163.

It is an arithmetic number, because the mean of its divisors is an integer number (10497881079).

Almost surely, 2^64986882805 is an apocalyptic number.

64986882805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64986882805 is a deficient number, since it is larger than the sum of its proper divisors (18996165827).

64986882805 is a wasteful number, since it uses less digits than its factorization.

64986882805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999798215.

The product of its (nonzero) digits is 53084160, while the sum is 64.

The spelling of 64986882805 in words is "sixty-four billion, nine hundred eighty-six million, eight hundred eighty-two thousand, eight hundred five".