64544644546 has 16 divisors (see below), whose sum is σ = 98652519864. Its totient is φ = 31660580224.

The previous prime is 64544644537. The next prime is 64544644553.

64544644546 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 62893116225 + 1651528321 = 250785^2 + 40639^2 .

It is a super-2 number, since 2×64544644546² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64544644493 and 64544644502.

It is an unprimeable number.

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, 1648776 + ... + 1687468.

Almost surely, 2^64544644546 is an apocalyptic number.

64544644546 is a deficient number, since it is larger than the sum of its proper divisors (34107875318).

64544644546 is a wasteful number, since it uses less digits than its factorization.

64544644546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54485.

The product of its digits is 22118400, while the sum is 52.

The spelling of 64544644546 in words is "sixty-four billion, five hundred forty-four million, six hundred forty-four thousand, five hundred forty-six".