64340578 has 4 divisors (see below), whose sum is σ = 96510870. Its totient is φ = 32170288.

The previous prime is 64340567. The next prime is 64340609. The reversal of 64340578 is 87504346.

64340578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 36324729 + 28015849 = 6027^2 + 5293^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16085143 + ... + 16085146.

Almost surely, 2^64340578 is an apocalyptic number.

64340578 is a deficient number, since it is larger than the sum of its proper divisors (32170292).

64340578 is a wasteful number, since it uses less digits than its factorization.

64340578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32170291.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 64340578 is about 8021.2578814049. The cubic root of 64340578 is about 400.7082825991.

The spelling of 64340578 in words is "sixty-four million, three hundred forty thousand, five hundred seventy-eight".