64539814 has 4 divisors (see below), whose sum is σ = 96809724. Its totient is φ = 32269906.

The previous prime is 64539809. The next prime is 64539821. The reversal of 64539814 is 41893546.

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

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16134952 + ... + 16134955.

It is an arithmetic number, because the mean of its divisors is an integer number (24202431).

Almost surely, 2^64539814 is an apocalyptic number.

64539814 is a deficient number, since it is larger than the sum of its proper divisors (32269910).

64539814 is a wasteful number, since it uses less digits than its factorization.

64539814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32269909.

The product of its digits is 103680, while the sum is 40.

The square root of 64539814 is about 8033.6675310844. The cubic root of 64539814 is about 401.1214653502.

The spelling of 64539814 in words is "sixty-four million, five hundred thirty-nine thousand, eight hundred fourteen".