555561672857 has 4 divisors (see below), whose sum is σ = 555563164596. Its totient is φ = 555560181120.

The previous prime is 555561672793. The next prime is 555561672871. The reversal of 555561672857 is 758276165555.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 264678351961 + 290883320896 = 514469^2 + 539336^2 .

It is a cyclic number.

It is not a de Polignac number, because 555561672857 - 2⁶ = 555561672793 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 555561672857.

It is not an unprimeable number, because it can be changed into a prime (555561678857) 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, 331613 + ... + 1105029.

It is an arithmetic number, because the mean of its divisors is an integer number (138890791149).

Almost surely, 2^555561672857 is an apocalyptic number.

It is an amenable number.

555561672857 is a deficient number, since it is larger than the sum of its proper divisors (1491739).

555561672857 is an equidigital number, since it uses as much as digits as its factorization.

555561672857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491738.

The product of its digits is 88200000, while the sum is 62.

The spelling of 555561672857 in words is "five hundred fifty-five billion, five hundred sixty-one million, six hundred seventy-two thousand, eight hundred fifty-seven".