11111100837857 has 2 divisors, whose sum is σ = 11111100837858. Its totient is φ = 11111100837856.

The previous prime is 11111100837853. The next prime is 11111100837869. The reversal of 11111100837857 is 75873800111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10488005313361 + 623095524496 = 3238519^2 + 789364^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111100837857 - 2² = 11111100837853 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111100837853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555550418928 + 5555550418929.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550418929).

Almost surely, 2^{11111100837857} is an apocalyptic number.

It is an amenable number.

11111100837857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111100837857 is an equidigital number, since it uses as much as digits as its factorization.

11111100837857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 44.

Adding to 11111100837857 its reverse (75873800111111), we get a palindrome (86984900948968).

The spelling of 11111100837857 in words is "eleven trillion, one hundred eleven billion, one hundred million, eight hundred thirty-seven thousand, eight hundred fifty-seven".