57243814391 has 4 divisors (see below), whose sum is σ = 57246346032. Its totient is φ = 57241282752.

The previous prime is 57243814343. The next prime is 57243814427. The reversal of 57243814391 is 19341834275.

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-57243814391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57243814321) 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, 1231595 + ... + 1277228.

It is an arithmetic number, because the mean of its divisors is an integer number (14311586508).

Almost surely, 2^57243814391 is an apocalyptic number.

57243814391 is a deficient number, since it is larger than the sum of its proper divisors (2531641).

57243814391 is a wasteful number, since it uses less digits than its factorization.

57243814391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531640.

The product of its digits is 725760, while the sum is 47.

The spelling of 57243814391 in words is "fifty-seven billion, two hundred forty-three million, eight hundred fourteen thousand, three hundred ninety-one".