57243216361 has 4 divisors (see below), whose sum is σ = 57244199824. Its totient is φ = 57242232900.

The previous prime is 57243216353. The next prime is 57243216367. The reversal of 57243216361 is 16361234275.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57243216361 - 2³ = 57243216353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57243216367) 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, 398535 + ... + 522796.

It is an arithmetic number, because the mean of its divisors is an integer number (14311049956).

Almost surely, 2^57243216361 is an apocalyptic number.

It is an amenable number.

57243216361 is a deficient number, since it is larger than the sum of its proper divisors (983463).

57243216361 is an equidigital number, since it uses as much as digits as its factorization.

57243216361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983462.

The product of its digits is 181440, while the sum is 40.

The spelling of 57243216361 in words is "fifty-seven billion, two hundred forty-three million, two hundred sixteen thousand, three hundred sixty-one".