4123565505857 has 4 divisors (see below), whose sum is σ = 4712646292416. Its totient is φ = 3534484719300.

The previous prime is 4123565505833. The next prime is 4123565505859. The reversal of 4123565505857 is 7585055653214.

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 4123565505857 - 2¹⁸ = 4123565243713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4123565505859) 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, 294540393269 + ... + 294540393282.

It is an arithmetic number, because the mean of its divisors is an integer number (1178161573104).

Almost surely, 2^{4123565505857} is an apocalyptic number.

It is an amenable number.

4123565505857 is a deficient number, since it is larger than the sum of its proper divisors (589080786559).

4123565505857 is an equidigital number, since it uses as much as digits as its factorization.

4123565505857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589080786558.

The product of its (nonzero) digits is 25200000, while the sum is 56.

The spelling of 4123565505857 in words is "four trillion, one hundred twenty-three billion, five hundred sixty-five million, five hundred five thousand, eight hundred fifty-seven".