64500566523 has 8 divisors (see below), whose sum is σ = 86003669328. Its totient is φ = 42998920704.

The previous prime is 64500566467. The next prime is 64500566549. The reversal of 64500566523 is 32566500546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64500566523 - 2²⁶ = 64433457659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64500566723) 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 7 ways as a sum of consecutive naturals, for example, 256386 + ... + 441287.

It is an arithmetic number, because the mean of its divisors is an integer number (10750458666).

Almost surely, 2^64500566523 is an apocalyptic number.

64500566523 is a deficient number, since it is larger than the sum of its proper divisors (21503102805).

64500566523 is a wasteful number, since it uses less digits than its factorization.

64500566523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728493.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 64500566523 in words is "sixty-four billion, five hundred million, five hundred sixty-six thousand, five hundred twenty-three".