65581520005 has 8 divisors (see below), whose sum is σ = 82119468672. Its totient is φ = 50184119568.

The previous prime is 65581520003. The next prime is 65581520009. The reversal of 65581520005 is 50002518556.

65581520005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65581520005 - 2¹ = 65581520003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65581520003) 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, 285136929 + ... + 285137158.

It is an arithmetic number, because the mean of its divisors is an integer number (10264933584).

Almost surely, 2^65581520005 is an apocalyptic number.

It is an amenable number.

65581520005 is a deficient number, since it is larger than the sum of its proper divisors (16537948667).

65581520005 is a wasteful number, since it uses less digits than its factorization.

65581520005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570274115.

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 65581520005 in words is "sixty-five billion, five hundred eighty-one million, five hundred twenty thousand, five".