64989129617 has 8 divisors (see below), whose sum is σ = 65109381120. Its totient is φ = 64868985280.

The previous prime is 64989129607. The next prime is 64989129679. The reversal of 64989129617 is 71692198946.

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 64989129617 - 2¹² = 64989125521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64989129617.

It is not an unprimeable number, because it can be changed into a prime (64989129607) 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 7 ways as a sum of consecutive naturals, for example, 1242128 + ... + 1293390.

It is an arithmetic number, because the mean of its divisors is an integer number (8138672640).

Almost surely, 2^64989129617 is an apocalyptic number.

It is an amenable number.

64989129617 is a deficient number, since it is larger than the sum of its proper divisors (120251503).

64989129617 is a wasteful number, since it uses less digits than its factorization.

64989129617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53583.

The product of its digits is 11757312, while the sum is 62.

The spelling of 64989129617 in words is "sixty-four billion, nine hundred eighty-nine million, one hundred twenty-nine thousand, six hundred seventeen".