64604608605 has 12 divisors (see below), whose sum is σ = 111981321660. Its totient is φ = 34455791232.

The previous prime is 64604608597. The next prime is 64604608609. The reversal of 64604608605 is 50680640646.

64604608605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18539000964 + 46065607641 = 136158^2 + 214629^2 .

It is not a de Polignac number, because 64604608605 - 2³ = 64604608597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1435657969 = 64604608605 / (6 + 4 + 6 + 0 + 4 + 6 + 0 + 8 + 6 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64604608609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717828940 + ... + 717829029.

It is an arithmetic number, because the mean of its divisors is an integer number (9331776805).

Almost surely, 2^64604608605 is an apocalyptic number.

It is an amenable number.

64604608605 is a deficient number, since it is larger than the sum of its proper divisors (47376713055).

64604608605 is a wasteful number, since it uses less digits than its factorization.

64604608605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435657980 (or 1435657977 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 64604608605 in words is "sixty-four billion, six hundred four million, six hundred eight thousand, six hundred five".