64520040571 has 8 divisors (see below), whose sum is σ = 77618094080. Its totient is φ = 52392213288.

The previous prime is 64520040569. The next prime is 64520040659. The reversal of 64520040571 is 17504002546.

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 64520040571 - 2¹ = 64520040569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64520040071) 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 7 ways as a sum of consecutive naturals, for example, 242556411 + ... + 242556676.

It is an arithmetic number, because the mean of its divisors is an integer number (9702261760).

Almost surely, 2^64520040571 is an apocalyptic number.

64520040571 is a deficient number, since it is larger than the sum of its proper divisors (13098053509).

64520040571 is a wasteful number, since it uses less digits than its factorization.

64520040571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485113113.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 64520040571 in words is "sixty-four billion, five hundred twenty million, forty thousand, five hundred seventy-one".