64505521105 has 8 divisors (see below), whose sum is σ = 77445360000. Its totient is φ = 51578593776.

The previous prime is 64505521081. The next prime is 64505521109. The reversal of 64505521105 is 50112550546.

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

It is a cyclic number.

It is not a de Polignac number, because 64505521105 - 2²¹ = 64503423953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64505521109) 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, 3216895 + ... + 3236884.

It is an arithmetic number, because the mean of its divisors is an integer number (9680670000).

Almost surely, 2^64505521105 is an apocalyptic number.

It is an amenable number.

64505521105 is a deficient number, since it is larger than the sum of its proper divisors (12939838895).

64505521105 is a wasteful number, since it uses less digits than its factorization.

64505521105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455783.

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 64505521105 in words is "sixty-four billion, five hundred five million, five hundred twenty-one thousand, one hundred five".