64744538 has 4 divisors (see below), whose sum is σ = 97116810. Its totient is φ = 32372268.

The previous prime is 64744507. The next prime is 64744553. The reversal of 64744538 is 83544746.

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., 40998409 + 23746129 = 6403^2 + 4873^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64744495 and 64744504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16186133 + ... + 16186136.

Almost surely, 2^64744538 is an apocalyptic number.

64744538 is a deficient number, since it is larger than the sum of its proper divisors (32372272).

64744538 is a wasteful number, since it uses less digits than its factorization.

64744538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32372271.

The product of its digits is 322560, while the sum is 41.

The square root of 64744538 is about 8046.3990703917. The cubic root of 64744538 is about 401.5451444694.

The spelling of 64744538 in words is "sixty-four million, seven hundred forty-four thousand, five hundred thirty-eight".