64560624409 has 4 divisors (see below), whose sum is σ = 64593117904. Its totient is φ = 64528130916.

The previous prime is 64560624407. The next prime is 64560624439. The reversal of 64560624409 is 90442606546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90442606546 = 2 ⋅45221303273.

It is a cyclic number.

It is not a de Polignac number, because 64560624409 - 2¹ = 64560624407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64560624407) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16243767 + ... + 16247740.

It is an arithmetic number, because the mean of its divisors is an integer number (16148279476).

Almost surely, 2^64560624409 is an apocalyptic number.

It is an amenable number.

64560624409 is a deficient number, since it is larger than the sum of its proper divisors (32493495).

64560624409 is a wasteful number, since it uses less digits than its factorization.

64560624409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32493494.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 64560624409 in words is "sixty-four billion, five hundred sixty million, six hundred twenty-four thousand, four hundred nine".