64505827 has 4 divisors (see below), whose sum is σ = 64538496. Its totient is φ = 64473160.

The previous prime is 64505809. The next prime is 64505851. The reversal of 64505827 is 72850546.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64505827 is a prime.

It is a super-3 number, since 3×64505827³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64505807) 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, 13168 + ... + 17389.

It is an arithmetic number, because the mean of its divisors is an integer number (16134624).

Almost surely, 2^64505827 is an apocalyptic number.

64505827 is a deficient number, since it is larger than the sum of its proper divisors (32669).

64505827 is a wasteful number, since it uses less digits than its factorization.

64505827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32668.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 64505827 is about 8031.5519670858. The cubic root of 64505827 is about 401.0510421073.

The spelling of 64505827 in words is "sixty-four million, five hundred five thousand, eight hundred twenty-seven".