10728243857 has 4 divisors (see below), whose sum is σ = 10737089460. Its totient is φ = 10719398256.

The previous prime is 10728243853. The next prime is 10728243859. The reversal of 10728243857 is 75834282701.

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 2573431441 + 8154812416 = 50729^2 + 90304^2 .

It is a cyclic number.

It is not a de Polignac number, because 10728243857 - 2² = 10728243853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10728243853) 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, 4420982 + ... + 4423407.

It is an arithmetic number, because the mean of its divisors is an integer number (2684272365).

Almost surely, 2^10728243857 is an apocalyptic number.

It is an amenable number.

10728243857 is a deficient number, since it is larger than the sum of its proper divisors (8845603).

10728243857 is an equidigital number, since it uses as much as digits as its factorization.

10728243857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845602.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 10728243857 in words is "ten billion, seven hundred twenty-eight million, two hundred forty-three thousand, eight hundred fifty-seven".