5243140645 has 4 divisors (see below), whose sum is σ = 6291768780. Its totient is φ = 4194512512.

The previous prime is 5243140631. The next prime is 5243140657. The reversal of 5243140645 is 5460413425.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3994366401 + 1248774244 = 63201^2 + 35338^2 .

It is a cyclic number.

It is not a de Polignac number, because 5243140645 - 2⁵ = 5243140613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5243140645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524314060 + ... + 524314069.

It is an arithmetic number, because the mean of its divisors is an integer number (1572942195).

Almost surely, 2^5243140645 is an apocalyptic number.

It is an amenable number.

5243140645 is a deficient number, since it is larger than the sum of its proper divisors (1048628135).

5243140645 is a wasteful number, since it uses less digits than its factorization.

5243140645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048628134.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 5243140645 is about 72409.5342133893. The cubic root of 5243140645 is about 1737.2560623672.

The spelling of 5243140645 in words is "five billion, two hundred forty-three million, one hundred forty thousand, six hundred forty-five".