52857405368857 has 4 divisors (see below), whose sum is σ = 52859793994420. Its totient is φ = 52855016743296.

The previous prime is 52857405368813. The next prime is 52857405368927. The reversal of 52857405368857 is 75886350475825.

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 25480850196736 + 27376555172121 = 5047856^2 + 5232261^2 .

It is a cyclic number.

It is not a de Polignac number, because 52857405368857 - 2¹¹ = 52857405366809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52857405368857.

It is not an unprimeable number, because it can be changed into a prime (52857405368657) 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, 1194279588 + ... + 1194323845.

It is an arithmetic number, because the mean of its divisors is an integer number (13214948498605).

Almost surely, 2^{52857405368857} is an apocalyptic number.

It is an amenable number.

52857405368857 is a deficient number, since it is larger than the sum of its proper divisors (2388625563).

52857405368857 is a wasteful number, since it uses less digits than its factorization.

52857405368857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388625562.

The product of its (nonzero) digits is 2257920000, while the sum is 73.

The spelling of 52857405368857 in words is "fifty-two trillion, eight hundred fifty-seven billion, four hundred five million, three hundred sixty-eight thousand, eight hundred fifty-seven".