64538459 has 4 divisors (see below), whose sum is σ = 67935240. Its totient is φ = 61141680.

The previous prime is 64538449. The next prime is 64538489. The reversal of 64538459 is 95483546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95483546 = 2 ⋅47741773.

It is a cyclic number.

It is not a de Polignac number, because 64538459 - 2⁸ = 64538203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64538449) 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, 1698362 + ... + 1698399.

It is an arithmetic number, because the mean of its divisors is an integer number (16983810).

Almost surely, 2^64538459 is an apocalyptic number.

64538459 is a deficient number, since it is larger than the sum of its proper divisors (3396781).

64538459 is a wasteful number, since it uses less digits than its factorization.

64538459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396780.

The product of its digits is 518400, while the sum is 44.

The square root of 64538459 is about 8033.5831980505. The cubic root of 64538459 is about 401.1186581766.

The spelling of 64538459 in words is "sixty-four million, five hundred thirty-eight thousand, four hundred fifty-nine".