64918738 has 4 divisors (see below), whose sum is σ = 97378110. Its totient is φ = 32459368.

The previous prime is 64918697. The next prime is 64918739. The reversal of 64918738 is 83781946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83781946 = 2 ⋅41890973.

It can be written as a sum of positive squares in only one way, i.e., 60326289 + 4592449 = 7767^2 + 2143^2 .

It is not an unprimeable number, because it can be changed into a prime (64918739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16229683 + ... + 16229686.

Almost surely, 2^64918738 is an apocalyptic number.

64918738 is a deficient number, since it is larger than the sum of its proper divisors (32459372).

64918738 is a wasteful number, since it uses less digits than its factorization.

64918738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32459371.

The product of its digits is 290304, while the sum is 46.

The square root of 64918738 is about 8057.2165168872. The cubic root of 64918738 is about 401.9049510026.

It can be divided in two parts, 64918 and 738, that added together give a palindrome (65656).

The spelling of 64918738 in words is "sixty-four million, nine hundred eighteen thousand, seven hundred thirty-eight".