7664440543 has 4 divisors (see below), whose sum is σ = 7665029568. Its totient is φ = 7663851520.

The previous prime is 7664440507. The next prime is 7664440549. The reversal of 7664440543 is 3450444667.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7664440543 - 2¹³ = 7664432351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7664440543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664440549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274543 + ... + 301168.

It is an arithmetic number, because the mean of its divisors is an integer number (1916257392).

Almost surely, 2^7664440543 is an apocalyptic number.

7664440543 is a deficient number, since it is larger than the sum of its proper divisors (589025).

7664440543 is a wasteful number, since it uses less digits than its factorization.

7664440543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589024.

The product of its (nonzero) digits is 967680, while the sum is 43.

The square root of 7664440543 is about 87546.7905922313. The cubic root of 7664440543 is about 1971.6363655730.

The spelling of 7664440543 in words is "seven billion, six hundred sixty-four million, four hundred forty thousand, five hundred forty-three".