64985440829 has 16 divisors (see below), whose sum is σ = 67179974400. Its totient is φ = 62827739520.

The previous prime is 64985440763. The next prime is 64985440831. The reversal of 64985440829 is 92804458946.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64985440829 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 (64985440529) 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 15 ways as a sum of consecutive naturals, for example, 9844472 + ... + 9851070.

It is an arithmetic number, because the mean of its divisors is an integer number (4198748400).

Almost surely, 2^64985440829 is an apocalyptic number.

It is an amenable number.

64985440829 is a deficient number, since it is larger than the sum of its proper divisors (2194533571).

64985440829 is a wasteful number, since it uses less digits than its factorization.

64985440829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9340.

The product of its (nonzero) digits is 19906560, while the sum is 59.

The spelling of 64985440829 in words is "sixty-four billion, nine hundred eighty-five million, four hundred forty thousand, eight hundred twenty-nine".