64573317640403 has 16 divisors (see below), whose sum is σ = 75947886233856. Its totient is φ = 54126308670240.

The previous prime is 64573317640397. The next prime is 64573317640423. The reversal of 64573317640403 is 30404671337546.

It is a cyclic number.

It is not a de Polignac number, because 64573317640403 - 2¹⁰ = 64573317639379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64573317640423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254417501 + ... + 254671182.

It is an arithmetic number, because the mean of its divisors is an integer number (4746742889616).

Almost surely, 2^{64573317640403} is an apocalyptic number.

64573317640403 is a deficient number, since it is larger than the sum of its proper divisors (11374568593453).

64573317640403 is a wasteful number, since it uses less digits than its factorization.

64573317640403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509089594.

The product of its (nonzero) digits is 15240960, while the sum is 53.

Adding to 64573317640403 its reverse (30404671337546), we get a palindrome (94977988977949).

The spelling of 64573317640403 in words is "sixty-four trillion, five hundred seventy-three billion, three hundred seventeen million, six hundred forty thousand, four hundred three".