64541587 has 4 divisors (see below), whose sum is σ = 70409016. Its totient is φ = 58674160.

The previous prime is 64541573. The next prime is 64541591. The reversal of 64541587 is 78514546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64541587 - 2²³ = 56152979 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64541557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2933698 + ... + 2933719.

It is an arithmetic number, because the mean of its divisors is an integer number (17602254).

Almost surely, 2^64541587 is an apocalyptic number.

64541587 is a deficient number, since it is larger than the sum of its proper divisors (5867429).

64541587 is a wasteful number, since it uses less digits than its factorization.

64541587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867428.

The product of its digits is 134400, while the sum is 40.

The square root of 64541587 is about 8033.7778784330. Note that the first 3 decimals coincide. The cubic root of 64541587 is about 401.1251384413.

The spelling of 64541587 in words is "sixty-four million, five hundred forty-one thousand, five hundred eighty-seven".