57243909643 has 2 divisors, whose sum is σ = 57243909644. Its totient is φ = 57243909642.

The previous prime is 57243909553. The next prime is 57243909649. The reversal of 57243909643 is 34690934275.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57243909643 is a prime.

It is a super-3 number, since 3×57243909643³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (57243909649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28621954821 + 28621954822.

It is an arithmetic number, because the mean of its divisors is an integer number (28621954822).

Almost surely, 2^57243909643 is an apocalyptic number.

57243909643 is a deficient number, since it is larger than the sum of its proper divisors (1).

57243909643 is an equidigital number, since it uses as much as digits as its factorization.

57243909643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 57243909643 in words is "fifty-seven billion, two hundred forty-three million, nine hundred nine thousand, six hundred forty-three".