64738543 has 4 divisors (see below), whose sum is σ = 64776520. Its totient is φ = 64700568.

The previous prime is 64738519. The next prime is 64738559. The reversal of 64738543 is 34583746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64738543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64738496 and 64738505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64738573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16305 + ... + 19882.

It is an arithmetic number, because the mean of its divisors is an integer number (16194130).

Almost surely, 2^64738543 is an apocalyptic number.

64738543 is a deficient number, since it is larger than the sum of its proper divisors (37977).

64738543 is a wasteful number, since it uses less digits than its factorization.

64738543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37976.

The product of its digits is 241920, while the sum is 40.

The square root of 64738543 is about 8046.0265348804. The cubic root of 64738543 is about 401.5327504383.

The spelling of 64738543 in words is "sixty-four million, seven hundred thirty-eight thousand, five hundred forty-three".