64566541605 has 64 divisors (see below), whose sum is σ = 107671449600. Its totient is φ = 33009949440.

The previous prime is 64566541579. The next prime is 64566541609. The reversal of 64566541605 is 50614566546.

It is not a de Polignac number, because 64566541605 - 2⁷ = 64566541477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64566541609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25034206 + ... + 25036784.

It is an arithmetic number, because the mean of its divisors is an integer number (1682366400).

Almost surely, 2^64566541605 is an apocalyptic number.

It is an amenable number.

64566541605 is a deficient number, since it is larger than the sum of its proper divisors (43104907995).

64566541605 is a wasteful number, since it uses less digits than its factorization.

64566541605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 64566541605 in words is "sixty-four billion, five hundred sixty-six million, five hundred forty-one thousand, six hundred five".