64516287 has 16 divisors (see below), whose sum is σ = 94227840. Its totient is φ = 38940000.

The previous prime is 64516273. The next prime is 64516303. The reversal of 64516287 is 78261546.

It is not a de Polignac number, because 64516287 - 2¹⁹ = 63991999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64516687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4389 + ... + 12177.

It is an arithmetic number, because the mean of its divisors is an integer number (5889240).

Almost surely, 2^64516287 is an apocalyptic number.

64516287 is a deficient number, since it is larger than the sum of its proper divisors (29711553).

64516287 is a wasteful number, since it uses less digits than its factorization.

64516287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054.

The product of its digits is 80640, while the sum is 39.

The square root of 64516287 is about 8032.2031224316. The cubic root of 64516287 is about 401.0727185324.

The spelling of 64516287 in words is "sixty-four million, five hundred sixteen thousand, two hundred eighty-seven".