5243972645 has 8 divisors (see below), whose sum is σ = 6298510104. Its totient is φ = 4191349504.

The previous prime is 5243972639. The next prime is 5243972681. The reversal of 5243972645 is 5462793425.

It can be written as a sum of positive squares in 4 ways, for example, as 1398236449 + 3845736196 = 37393^2 + 62014^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5243972645 - 2⁸ = 5243972389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5243972645.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 472544 + ... + 483513.

It is an arithmetic number, because the mean of its divisors is an integer number (787313763).

Almost surely, 2^5243972645 is an apocalyptic number.

It is an amenable number.

5243972645 is a deficient number, since it is larger than the sum of its proper divisors (1054537459).

5243972645 is a wasteful number, since it uses less digits than its factorization.

5243972645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957159.

The product of its digits is 1814400, while the sum is 47.

The square root of 5243972645 is about 72415.2790852870. The cubic root of 5243972645 is about 1737.3479488079.

The spelling of 5243972645 in words is "five billion, two hundred forty-three million, nine hundred seventy-two thousand, six hundred forty-five".