64065305405563 has 16 divisors (see below), whose sum is σ = 79877770260480. Its totient is φ = 49918427985600.

The previous prime is 64065305405551. The next prime is 64065305405597. The reversal of 64065305405563 is 36550450356046.

It is a cyclic number.

It is not a de Polignac number, because 64065305405563 - 2⁴¹ = 61866282150011 is a prime.

It is a super-2 number, since 2×64065305405563² (a number of 28 digits) contains 22 as substring.

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 64065305405563.

It is not an unprimeable number, because it can be changed into a prime (64065305405513) 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, 20081883 + ... + 23052388.

It is an arithmetic number, because the mean of its divisors is an integer number (4992360641280).

Almost surely, 2^{64065305405563} is an apocalyptic number.

64065305405563 is a deficient number, since it is larger than the sum of its proper divisors (15812464854917).

64065305405563 is a wasteful number, since it uses less digits than its factorization.

64065305405563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43153578.

The product of its (nonzero) digits is 19440000, while the sum is 52.

The spelling of 64065305405563 in words is "sixty-four trillion, sixty-five billion, three hundred five million, four hundred five thousand, five hundred sixty-three".