64005565623 has 8 divisors (see below), whose sum is σ = 85342195200. Its totient is φ = 42669656568.

The previous prime is 64005565609. The next prime is 64005565669. The reversal of 64005565623 is 32656550046.

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

It is not a de Polignac number, because 64005565623 - 2¹⁶ = 64005500087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64005565523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81388 + ... + 366926.

It is an arithmetic number, because the mean of its divisors is an integer number (10667774400).

Almost surely, 2^64005565623 is an apocalyptic number.

64005565623 is a deficient number, since it is larger than the sum of its proper divisors (21336629577).

64005565623 is a wasteful number, since it uses less digits than its factorization.

64005565623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360261.

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

The spelling of 64005565623 in words is "sixty-four billion, five million, five hundred sixty-five thousand, six hundred twenty-three".